# GemFYI > Comprehensive gemstone encyclopedia — gemstones with physical, optical, value, and cultural properties. Categories include precious, semi-precious, organic, and synthetic gems. Covers Mohs hardness, refractive index, color science, birthstones, origins, treatments, and jewelry suitability. ## Data Scope - Gemstones with physical properties (Mohs hardness, specific gravity, crystal system, cleavage, luster) - Optical properties (refractive index, birefringence, dispersion, pleochroism, fluorescence) - Color data (primary color, color range, color cause, allochromatic vs idiochromatic) - Value and market data (price tiers, price per carat ranges, value factors) - Cultural data (birthstone months, zodiac signs, anniversary years, symbolism) - Treatment information (common treatments, disclosure guidelines) - Jewelry use data (durability rating, popular cuts, care instructions) - Gem origins with quality tiers (legendary, premium, commercial) - Gem comparisons (N² pages) with side-by-side analysis - Glossary terms organized by gemology category - Guides in series with full markdown content - Interactive tools: comparator, property ranker, carat converter, price estimator, and more - 15 languages supported with i18n ## URL Patterns - Append `.md` to any URL for plain-text markdown format. - i18n: URL prefix `/{lang}` for non-English (ko, ja, zh-hans, es, fr, de, pt, ru, vi, tr, ar, hi, th, id). - `/` — Homepage with featured gems and stats (e.g. `/`) - `/gems/` — Browse all gemstones (e.g. `/gems/`) - `/gems/{slug}/` — Gemstone detail page (e.g. `/gems/diamond/`) - `/compare/` — Gem comparison index (e.g. `/compare/`) - `/compare/{slug_a}-vs-{slug_b}/` — Gem comparison (e.g. `/compare/diamond-vs-moissanite/`) - `/category/{slug}/` — Gem category (precious, semi-precious, etc.) (e.g. `/category/precious/`) - `/colors/` — Browse gems by color (e.g. `/colors/`) - `/colors/{color}/` — Gems of a specific color (e.g. `/colors/red/`) - `/origins/` — Gemstone origins and mining regions (e.g. `/origins/`) - `/origins/{slug}/` — Origin detail (e.g. `/origins/kashmir/`) - `/birthstones/` — Birthstone guide by month (e.g. `/birthstones/`) - `/birthstones/{month}/` — Birthstone for a month (e.g. `/birthstones/april/`) - `/glossary/` — Gemology glossary (e.g. `/glossary/`) - `/glossary/{slug}/` — Glossary term (e.g. `/glossary/birefringence/`) - `/guides/` — Gemstone guides (e.g. `/guides/`) - `/guide/{slug}/` — Guide article (e.g. `/guide/diamond-buying-guide/`) - `/tools/` — Interactive gemstone tools (e.g. `/tools/`) - `/tool/{slug}/` — Tool page (e.g. `/tool/gem-comparator/`) - `/gems/{slug}/buying-guide/` — Buying guide for a gem (e.g. `/gems/emerald/buying-guide/`) ## Browse Gems - [All Gemstones](https://gemfyi.com/gems/) - [By Category](https://gemfyi.com/category/precious/) - [By Color](https://gemfyi.com/colors/) - [Birthstones](https://gemfyi.com/birthstones/) - [Origins](https://gemfyi.com/origins/) - [Gem Comparisons](https://gemfyi.com/compare/) ## Interactive Tools - [Gem Comparator](https://gemfyi.com/tool/gem-comparator/) - [Gem Property Ranker](https://gemfyi.com/tool/gem-property-ranker/) - [Carat Weight Converter](https://gemfyi.com/tool/carat-weight-converter/) - [Gemstone Price Estimator](https://gemfyi.com/tool/price-estimator/) - [Ring Size Converter](https://gemfyi.com/tool/ring-size-guide/) - [Brilliance & Fire Calculator](https://gemfyi.com/tool/brilliance-calculator/) - [Specific Gravity Tester](https://gemfyi.com/tool/specific-gravity-tester/) - [Gem Dimensions Estimator](https://gemfyi.com/tool/gem-dimensions-calculator/) ## Learn - [Gemology Glossary](https://gemfyi.com/glossary/) - [Guides](https://gemfyi.com/guides/) ## Embed Widget - [GemFYI Widget Docs](https://widget.gemfyi.com) - [gemfyi-embed on npm](https://www.npmjs.com/package/gemfyi-embed) - [gemfyi-embed on GitHub](https://github.com/fyipedia/gemfyi-embed) ## REST API Free REST API. No authentication required. JSON responses. CORS enabled. | Method | Endpoint | Description | |--------|----------|-------------| | GET | `/api/v1/gems/` | List gemstones (DRF, paginated) | | GET | `/api/v1/gems/{slug}/` | Gemstone detail | | GET | `/api/v1/categories/` | Gem categories (DRF, paginated) | | GET | `/api/v1/origins/` | Gem origins (DRF, paginated) | | GET | `/api/v1/glossary/` | Glossary terms (DRF, paginated) | | GET | `/api/v1/guides/` | Guides (DRF, paginated) | | GET | `/api/v1/tools/` | Interactive tools (DRF, paginated) | | GET | `/api/v1/faqs/` | FAQs (DRF, paginated) | | GET | `/api/v1/search/?q={query}` | Unified search (DRF) | | GET | `/api/v1/stats/` | Site statistics | ```bash curl -s "https://gemfyi.com/api/v1/gems/" ``` [API Docs](https://gemfyi.com/developers/) · [OpenAPI Spec](https://gemfyi.com/api/openapi.json) ## Developer Tools - **PyPI**: `pip install gemfyi` — [gemfyi](https://pypi.org/project/gemfyi/) — Gemstone data, Mohs scale, optical properties - **Embed Widget**: [gemfyi-embed](https://widget.gemfyi.com) ## Science FYI Family Part of [FYIPedia](https://fyipedia.com) developer tools ecosystem. - [ChemFYI](https://chemfyi.com) — Periodic table, elements, compounds, reactions - [AlloyFYI](https://alloyfyi.com) — Metal alloys, compositions, properties - [StarFYI](https://starfyi.com) — Stars, constellations, exoplanets, deep-sky objects - [MineralFYI](https://mineralfyi.com) — 6,215 minerals, crystal systems, Mohs hardness ## Images (CDN) OG images for all entities at https://cdn.gemfyi.com/og/{type}/{slug}.png - https://cdn.gemfyi.com/og/homepage.png ## All Gemstones - [Achroite](https://gemfyi.com/gems/achroite/) - [Actinolite](https://gemfyi.com/gems/actinolite/) - [Adamite](https://gemfyi.com/gems/adamite/) - [Adularia](https://gemfyi.com/gems/adularia/) - [Aegirine](https://gemfyi.com/gems/aegirine/) - [Afghanite](https://gemfyi.com/gems/afghanite/) - [Agalmatolite](https://gemfyi.com/gems/agalmatolite/) - [Agate](https://gemfyi.com/gems/agate/) - [Agate Opal](https://gemfyi.com/gems/agate-opal/) - [Alabaster](https://gemfyi.com/gems/alabaster/) - [Albite](https://gemfyi.com/gems/albite/) - [Alexandrite](https://gemfyi.com/gems/alexandrite/) - [Allanite](https://gemfyi.com/gems/allanite/) - [Almandine](https://gemfyi.com/gems/almandine/) - [Almandine-Pyrope](https://gemfyi.com/gems/almandine-pyrope/) - [Amazonite](https://gemfyi.com/gems/amazonite/) - [Amber](https://gemfyi.com/gems/amber/) - [Amblygonite](https://gemfyi.com/gems/amblygonite/) - [Amethyst](https://gemfyi.com/gems/amethyst/) - [Ametrine](https://gemfyi.com/gems/ametrine/) - [Ammolite](https://gemfyi.com/gems/ammolite/) - [Analcime (Analcite)](https://gemfyi.com/gems/analcime-analcite/) - [Anatase](https://gemfyi.com/gems/anatase/) - [Andalusite](https://gemfyi.com/gems/andalusite/) - [Andesine](https://gemfyi.com/gems/andesine/) - [Andradite](https://gemfyi.com/gems/andradite/) - [Anglesite](https://gemfyi.com/gems/anglesite/) - [Anhydrite](https://gemfyi.com/gems/anhydrite/) - [Anorthite](https://gemfyi.com/gems/anorthite/) - [Anorthoclase](https://gemfyi.com/gems/anorthoclase/) - [Anthophyllite](https://gemfyi.com/gems/anthophyllite/) - [Antigorite](https://gemfyi.com/gems/antigorite/) - [Anyolite](https://gemfyi.com/gems/anyolite/) - [Apatite](https://gemfyi.com/gems/apatite/) - [Apophyllite Group](https://gemfyi.com/gems/apophyllite-group/) - [Aquamarine](https://gemfyi.com/gems/aquamarine/) - [Aragonite](https://gemfyi.com/gems/aragonite/) - [Astrophyllite](https://gemfyi.com/gems/astrophyllite/) - [Augelite](https://gemfyi.com/gems/augelite/) - [Augite](https://gemfyi.com/gems/augite/) - [Aventurine](https://gemfyi.com/gems/aventurine/) - [Axinite](https://gemfyi.com/gems/axinite/) - [Azurite](https://gemfyi.com/gems/azurite/) - [Azurmalachite](https://gemfyi.com/gems/azurmalachite/) - [Baddeleyite](https://gemfyi.com/gems/baddeleyite/) - [Baryte (Barite)](https://gemfyi.com/gems/baryte-barite/) - [Bastnäsite](https://gemfyi.com/gems/bastnasite/) - [Benitoite](https://gemfyi.com/gems/benitoite/) - [Bertrandite](https://gemfyi.com/gems/bertrandite/) - [Beryl](https://gemfyi.com/gems/beryl/) - [Beryllonite](https://gemfyi.com/gems/beryllonite/) - [Bikolite](https://gemfyi.com/gems/bikolite/) - [Binghamite](https://gemfyi.com/gems/binghamite/) - [Black Opal](https://gemfyi.com/gems/black-opal/) - [Bloodstone (Heliotrope)](https://gemfyi.com/gems/bloodstone-heliotrope/) - [Blue Beryl (Maxixe)](https://gemfyi.com/gems/blue-beryl-maxixe/) - [Blue John](https://gemfyi.com/gems/blue-john/) - [Boleite](https://gemfyi.com/gems/boleite/) - [Boracite](https://gemfyi.com/gems/boracite/) - [Boulder Opal](https://gemfyi.com/gems/boulder-opal/) - [Bowenite](https://gemfyi.com/gems/bowenite/) - [Brazilianite](https://gemfyi.com/gems/brazilianite/) - [Bronzite](https://gemfyi.com/gems/bronzite/) - [Brookite](https://gemfyi.com/gems/brookite/) - [Brucite](https://gemfyi.com/gems/brucite/) - [Bustamite](https://gemfyi.com/gems/bustamite/) - [Bytownite](https://gemfyi.com/gems/bytownite/) - [Calcite](https://gemfyi.com/gems/calcite/) - [Calcite Satin Spar](https://gemfyi.com/gems/calcite-satin-spar/) - [Caledonite](https://gemfyi.com/gems/caledonite/) - [Californite](https://gemfyi.com/gems/californite/) - [Cancrinite](https://gemfyi.com/gems/cancrinite/) - [Carletonite](https://gemfyi.com/gems/carletonite/) - [Carnelian](https://gemfyi.com/gems/carnelian/) - [Cassiterite](https://gemfyi.com/gems/cassiterite/) - [Catapleiite](https://gemfyi.com/gems/catapleiite/) - [Celestine](https://gemfyi.com/gems/celestine/) - [Cerussite](https://gemfyi.com/gems/cerussite/) - [Ceylonite](https://gemfyi.com/gems/ceylonite/) - [Chabazite](https://gemfyi.com/gems/chabazite/) - [Chalcedony](https://gemfyi.com/gems/chalcedony/) - [Chalcopyrite](https://gemfyi.com/gems/chalcopyrite/) - [Chambersite](https://gemfyi.com/gems/chambersite/) - [Charoite](https://gemfyi.com/gems/charoite/) - [Chiastolite](https://gemfyi.com/gems/chiastolite/) - [Childrenite](https://gemfyi.com/gems/childrenite/) - [Chlorapatite](https://gemfyi.com/gems/chlorapatite/) - [Chlorastrolite](https://gemfyi.com/gems/chlorastrolite/) - [Chondrodite](https://gemfyi.com/gems/chondrodite/) - [Chrome-Chalcedony](https://gemfyi.com/gems/chrome-chalcedony/) - [Chrome-Diopside](https://gemfyi.com/gems/chrome-diopside/) - [Chrome Pyrope](https://gemfyi.com/gems/chrome-pyrope/) - [Chrome-Tourmaline](https://gemfyi.com/gems/chrome-tourmaline/) - [Chrome-Tremolite](https://gemfyi.com/gems/chrome-tremolite/) - [Chrysoberyl](https://gemfyi.com/gems/chrysoberyl/) - [Chrysocolla](https://gemfyi.com/gems/chrysocolla/) - [Chrysoprase](https://gemfyi.com/gems/chrysoprase/) - [Chrysotile](https://gemfyi.com/gems/chrysotile/) - [Cinnabar](https://gemfyi.com/gems/cinnabar/) - [Citrine](https://gemfyi.com/gems/citrine/) - [Clinochlore](https://gemfyi.com/gems/clinochlore/) - [Clinohedrite](https://gemfyi.com/gems/clinohedrite/) - [Clinohumite](https://gemfyi.com/gems/clinohumite/) - [Clinozoisite](https://gemfyi.com/gems/clinozoisite/) - [Cobaltite](https://gemfyi.com/gems/cobaltite/) - [Colemanite](https://gemfyi.com/gems/colemanite/) - [Common Opal](https://gemfyi.com/gems/common-opal/) - [Copal](https://gemfyi.com/gems/copal/) - [Coral](https://gemfyi.com/gems/coral/) - [Cordierite (Iolite)](https://gemfyi.com/gems/cordierite-iolite/) - [Corundum](https://gemfyi.com/gems/corundum/) - [Covellite](https://gemfyi.com/gems/covellite/) - [Creedite](https://gemfyi.com/gems/creedite/) - [Cristinite](https://gemfyi.com/gems/cristinite/) - [Crocoite](https://gemfyi.com/gems/crocoite/) - [Cryolite](https://gemfyi.com/gems/cryolite/) - [Crystal Opal](https://gemfyi.com/gems/crystal-opal/) - [Cubic Zirconia](https://gemfyi.com/gems/cubic-zirconia/) - [Cuprite](https://gemfyi.com/gems/cuprite/) - [Cymophane](https://gemfyi.com/gems/cymophane/) - [Cyprine (of Berzelius)](https://gemfyi.com/gems/cyprine-of-berzelius/) - [Dallasite](https://gemfyi.com/gems/dallasite/) - [Danburite](https://gemfyi.com/gems/danburite/) - [Datolite](https://gemfyi.com/gems/datolite/) - [Demantoid](https://gemfyi.com/gems/demantoid/) - [Diamond](https://gemfyi.com/gems/diamond/) - [Diaspore](https://gemfyi.com/gems/diaspore/) - [Diopside](https://gemfyi.com/gems/diopside/) - [Dioptase](https://gemfyi.com/gems/dioptase/) - [Dolomite](https://gemfyi.com/gems/dolomite/) - [Dravite](https://gemfyi.com/gems/dravite/) - [Dumortierite](https://gemfyi.com/gems/dumortierite/) - [Ekanite](https://gemfyi.com/gems/ekanite/) - [Elaeolite](https://gemfyi.com/gems/elaeolite/) - [Elbaite](https://gemfyi.com/gems/elbaite/) - [Emerald](https://gemfyi.com/gems/emerald/) - [Enstatite](https://gemfyi.com/gems/enstatite/) - [Eosphorite](https://gemfyi.com/gems/eosphorite/) - [Epidote](https://gemfyi.com/gems/epidote/) - [Esperite](https://gemfyi.com/gems/esperite/) - [Ettringite](https://gemfyi.com/gems/ettringite/) - [Euclase](https://gemfyi.com/gems/euclase/) - [Eudialyte](https://gemfyi.com/gems/eudialyte/) - [Falcon's Eye](https://gemfyi.com/gems/falcons-eye/) - [Faustite](https://gemfyi.com/gems/faustite/) - [Fayalite](https://gemfyi.com/gems/fayalite/) - [Feldspar](https://gemfyi.com/gems/feldspar/) - [Ferro-axinite (Axinite-(Fe))](https://gemfyi.com/gems/ferro-axinite-axinite-fe/) - [Fibrolite](https://gemfyi.com/gems/fibrolite/) - [Fire Agate](https://gemfyi.com/gems/fire-agate/) - [Fire Opal](https://gemfyi.com/gems/fire-opal/) - [Fluorapatite](https://gemfyi.com/gems/fluorapatite/) - [Fluor-buergerite](https://gemfyi.com/gems/fluor-buergerite/) - [Fluorite](https://gemfyi.com/gems/fluorite/) - [Fluor-uvite-Uvite Series](https://gemfyi.com/gems/fluor-uvite-uvite-series/) - [Foitite](https://gemfyi.com/gems/foitite/) - [Forsterite](https://gemfyi.com/gems/forsterite/) - [Franklinite](https://gemfyi.com/gems/franklinite/) - [Friedelite](https://gemfyi.com/gems/friedelite/) - [Fuchsite](https://gemfyi.com/gems/fuchsite/) - [Gadolinium Gallium Garnet (GGG)](https://gemfyi.com/gems/gadolinium-gallium-garnet-ggg/) - [Gahnite](https://gemfyi.com/gems/gahnite/) - [Gahnospinel](https://gemfyi.com/gems/gahnospinel/) - [Garnet Group](https://gemfyi.com/gems/garnet-group/) - [Gaspéite](https://gemfyi.com/gems/gaspeite/) - [Gedrite](https://gemfyi.com/gems/gedrite/) - [Girasol](https://gemfyi.com/gems/girasol/) - [Glass](https://gemfyi.com/gems/glass/) - [Goethite](https://gemfyi.com/gems/goethite/) - [Goldstone](https://gemfyi.com/gems/goldstone/) - [Goshenite](https://gemfyi.com/gems/goshenite/) - [Grandidierite](https://gemfyi.com/gems/grandidierite/) - [Grossular](https://gemfyi.com/gems/grossular/) - [Gypsum](https://gemfyi.com/gems/gypsum/) - [Hackmanite](https://gemfyi.com/gems/hackmanite/) - [Hambergite](https://gemfyi.com/gems/hambergite/) - [Hardystonite](https://gemfyi.com/gems/hardystonite/) - [Harlequin Opal](https://gemfyi.com/gems/harlequin-opal/) - [Haüyne](https://gemfyi.com/gems/hauyne/) - [Heliodor (Golden Beryl)](https://gemfyi.com/gems/heliodor-golden-beryl/) - [Hematite](https://gemfyi.com/gems/hematite/) - [Hemimorphite](https://gemfyi.com/gems/hemimorphite/) - [Hercynite](https://gemfyi.com/gems/hercynite/) - [Herderite](https://gemfyi.com/gems/herderite/) - [Hessonite](https://gemfyi.com/gems/hessonite/) - [Hexagonite](https://gemfyi.com/gems/hexagonite/) - [Hibonite](https://gemfyi.com/gems/hibonite/) - [Hibschite](https://gemfyi.com/gems/hibschite/) - [Hiddenite](https://gemfyi.com/gems/hiddenite/) - [Hodgkinsonite](https://gemfyi.com/gems/hodgkinsonite/) - [Holmquistite](https://gemfyi.com/gems/holmquistite/) - [Honey Opal](https://gemfyi.com/gems/honey-opal/) - [Howlite](https://gemfyi.com/gems/howlite/) - [Hübnerite](https://gemfyi.com/gems/hubnerite/) - [Humite](https://gemfyi.com/gems/humite/) - [Hureaulite](https://gemfyi.com/gems/hureaulite/) - [Hurlbutite](https://gemfyi.com/gems/hurlbutite/) - [Hyacinth](https://gemfyi.com/gems/hyacinth/) - [Hyalite](https://gemfyi.com/gems/hyalite/) - [Hydrogrossular](https://gemfyi.com/gems/hydrogrossular/) - [Hydrophane](https://gemfyi.com/gems/hydrophane/) - [Hypersthene](https://gemfyi.com/gems/hypersthene/) - [Imperial Topaz (A variety of topaz of orange, pinkish colours.)](https://gemfyi.com/gems/imperial-topaz-a-variety-of-topaz-of-orange-pinkish-colours/) - [Inderite](https://gemfyi.com/gems/inderite/) - [Indicolite (Blue Tourmaline)](https://gemfyi.com/gems/indicolite-blue-tourmaline/) - [Iris Agate](https://gemfyi.com/gems/iris-agate/) - [Ivory](https://gemfyi.com/gems/ivory/) - [Jacobsite](https://gemfyi.com/gems/jacobsite/) - [Jade](https://gemfyi.com/gems/jade/) - [Jadeite](https://gemfyi.com/gems/jadeite/) - [Jasper](https://gemfyi.com/gems/jasper/) - [Jeremejevite](https://gemfyi.com/gems/jeremejevite/) - [Jet](https://gemfyi.com/gems/jet/) - [Johachidolite](https://gemfyi.com/gems/johachidolite/) - [Kämmererite](https://gemfyi.com/gems/kammererite/) - [Kornerupine](https://gemfyi.com/gems/kornerupine/) - [Kunzite](https://gemfyi.com/gems/kunzite/) - [Kyanite (Cyprine)](https://gemfyi.com/gems/kyanite-cyprine/) - [Labradorite](https://gemfyi.com/gems/labradorite/) - [Lapis lazuli](https://gemfyi.com/gems/lapis-lazuli/) - [Larimar](https://gemfyi.com/gems/larimar/) - [Larvikite](https://gemfyi.com/gems/larvikite/) - [Lazulite](https://gemfyi.com/gems/lazulite/) - [Lazurite](https://gemfyi.com/gems/lazurite/) - [Legrandite](https://gemfyi.com/gems/legrandite/) - [Lepidolite](https://gemfyi.com/gems/lepidolite/) - [Leucite](https://gemfyi.com/gems/leucite/) - [Libyan Desert Glass](https://gemfyi.com/gems/libyan-desert-glass/) - [Liddicoatite](https://gemfyi.com/gems/liddicoatite/) - [Linarite](https://gemfyi.com/gems/linarite/) - [Lizardite](https://gemfyi.com/gems/lizardite/) - [Londonite](https://gemfyi.com/gems/londonite/) - [Ludlamite](https://gemfyi.com/gems/ludlamite/) - [Magnesio-axinite (Axinite-(Mg))](https://gemfyi.com/gems/magnesio-axinite-axinite-mg/) - [Magnesite](https://gemfyi.com/gems/magnesite/) - [Magnetite](https://gemfyi.com/gems/magnetite/) - [Malachite](https://gemfyi.com/gems/malachite/) - [Manganaxinite (Axinite-(Mn))](https://gemfyi.com/gems/manganaxinite-axinite-mn/) - [Manganotantalite](https://gemfyi.com/gems/manganotantalite/) - [Marcasite](https://gemfyi.com/gems/marcasite/) - [Marialite](https://gemfyi.com/gems/marialite/) - [Matrix Opal](https://gemfyi.com/gems/matrix-opal/) - [Maw Sit Sit](https://gemfyi.com/gems/maw-sit-sit/) - [Meionite](https://gemfyi.com/gems/meionite/) - [Melanite](https://gemfyi.com/gems/melanite/) - [Mellite](https://gemfyi.com/gems/mellite/) - [Microcline](https://gemfyi.com/gems/microcline/) - [Microlite](https://gemfyi.com/gems/microlite/) - [Milarite](https://gemfyi.com/gems/milarite/) - [Milk Opal (Porcelain Opal)](https://gemfyi.com/gems/milk-opal-porcelain-opal/) - [Mimetite](https://gemfyi.com/gems/mimetite/) - [Mohawkite](https://gemfyi.com/gems/mohawkite/) - [Moissanite](https://gemfyi.com/gems/moissanite/) - [Moldavite](https://gemfyi.com/gems/moldavite/) - [Monazite](https://gemfyi.com/gems/monazite/) - [Montebrasite](https://gemfyi.com/gems/montebrasite/) - [Moonstone](https://gemfyi.com/gems/moonstone/) - [Morganite](https://gemfyi.com/gems/morganite/) - [Morion](https://gemfyi.com/gems/morion/) - [Moroxite](https://gemfyi.com/gems/moroxite/) - [Moss Agate](https://gemfyi.com/gems/moss-agate/) - [Moss Opal](https://gemfyi.com/gems/moss-opal/) - [Mother of Pearl](https://gemfyi.com/gems/mother-of-pearl/) - [Muscovite](https://gemfyi.com/gems/muscovite/) - [Musgravite](https://gemfyi.com/gems/musgravite/) - [Nano-Polycrystalline Diamond](https://gemfyi.com/gems/nano-polycrystalline-diamond/) - [Narsarsukite](https://gemfyi.com/gems/narsarsukite/) - [Natrolite](https://gemfyi.com/gems/natrolite/) - [Nepheline](https://gemfyi.com/gems/nepheline/) - [Nephrite](https://gemfyi.com/gems/nephrite/) - [Neptunite](https://gemfyi.com/gems/neptunite/) - [Nifontovite](https://gemfyi.com/gems/nifontovite/) - [Norbergite](https://gemfyi.com/gems/norbergite/) - [Nosean](https://gemfyi.com/gems/nosean/) - [Nuummite](https://gemfyi.com/gems/nuummite/) - [Obsidian](https://gemfyi.com/gems/obsidian/) - [Odontolite](https://gemfyi.com/gems/odontolite/) - [Oligoclase](https://gemfyi.com/gems/oligoclase/) - [Omphacite](https://gemfyi.com/gems/omphacite/) - [Onyx](https://gemfyi.com/gems/onyx/) - [Opal](https://gemfyi.com/gems/opal/) - [Orthoclase](https://gemfyi.com/gems/orthoclase/) - [Padparadscha](https://gemfyi.com/gems/padparadscha/) - [Painite](https://gemfyi.com/gems/painite/) - [Papagoite](https://gemfyi.com/gems/papagoite/) - [Paraíba Tourmaline (Cuprian Elbaite)](https://gemfyi.com/gems/paraiba-tourmaline-cuprian-elbaite/) - [Pargasite](https://gemfyi.com/gems/pargasite/) - [Parisite](https://gemfyi.com/gems/parisite/) - [Pearl](https://gemfyi.com/gems/pearl/) - [Pectolite](https://gemfyi.com/gems/pectolite/) - [Periclase](https://gemfyi.com/gems/periclase/) - [Peridot (Olivine)](https://gemfyi.com/gems/peridot-olivine/) - [Petalite](https://gemfyi.com/gems/petalite/) - [Petrified Wood (Fossilized Wood)](https://gemfyi.com/gems/petrified-wood-fossilized-wood/) - [Pezzottaite](https://gemfyi.com/gems/pezzottaite/) - [Phenakite](https://gemfyi.com/gems/phenakite/) - [Phosgenite](https://gemfyi.com/gems/phosgenite/) - [Phosphophyllite](https://gemfyi.com/gems/phosphophyllite/) - [Phosphosiderite](https://gemfyi.com/gems/phosphosiderite/) - [Pink Opal](https://gemfyi.com/gems/pink-opal/) - [Pleonaste](https://gemfyi.com/gems/pleonaste/) - [Pollucite](https://gemfyi.com/gems/pollucite/) - [Poudretteite](https://gemfyi.com/gems/poudretteite/) - [Povondraite](https://gemfyi.com/gems/povondraite/) - [Powellite](https://gemfyi.com/gems/powellite/) - [Prase](https://gemfyi.com/gems/prase/) - [Prase Opal](https://gemfyi.com/gems/prase-opal/) - [Prasiolite](https://gemfyi.com/gems/prasiolite/) - [Precious Opal](https://gemfyi.com/gems/precious-opal/) - [Prehnite](https://gemfyi.com/gems/prehnite/) - [Proustite](https://gemfyi.com/gems/proustite/) - [Pumpellyite Subgroup](https://gemfyi.com/gems/pumpellyite-subgroup/) - [Purpurite](https://gemfyi.com/gems/purpurite/) - [Pyrargyrite](https://gemfyi.com/gems/pyrargyrite/) - [Pyrite](https://gemfyi.com/gems/pyrite/) - [Pyromorphite](https://gemfyi.com/gems/pyromorphite/) - [Pyrope](https://gemfyi.com/gems/pyrope/) - [Pyrope-Spessartine](https://gemfyi.com/gems/pyrope-spessartine/) - [Pyrophyllite](https://gemfyi.com/gems/pyrophyllite/) - [Pyroxmangite](https://gemfyi.com/gems/pyroxmangite/) - [Quartz](https://gemfyi.com/gems/quartz/) - [Realgar](https://gemfyi.com/gems/realgar/) - [Red Beryl (Bixbite)](https://gemfyi.com/gems/red-beryl-bixbite/) - [Rhodizite](https://gemfyi.com/gems/rhodizite/) - [Rhodochrosite (Manganesespar)](https://gemfyi.com/gems/rhodochrosite-manganesespar/) - [Rhodolite](https://gemfyi.com/gems/rhodolite/) - [Rhodonite](https://gemfyi.com/gems/rhodonite/) - [Riesling Beryl](https://gemfyi.com/gems/riesling-beryl/) - [Rinkite-(Ce)](https://gemfyi.com/gems/rinkite-ce/) - [Rock Crystal](https://gemfyi.com/gems/rock-crystal/) - [Romanèchite](https://gemfyi.com/gems/romanechite/) - [Rose Quartz](https://gemfyi.com/gems/rose-quartz/) - [Rossmanite](https://gemfyi.com/gems/rossmanite/) - [Rubellite](https://gemfyi.com/gems/rubellite/) - [Ruby](https://gemfyi.com/gems/ruby/) - [Rutilated Quartz](https://gemfyi.com/gems/rutilated-quartz/) - [Rutile](https://gemfyi.com/gems/rutile/) - [Sanidine](https://gemfyi.com/gems/sanidine/) - [Sapphire](https://gemfyi.com/gems/sapphire/) - [Sapphirine](https://gemfyi.com/gems/sapphirine/) - [Sarcopside](https://gemfyi.com/gems/sarcopside/) - [Sard](https://gemfyi.com/gems/sard/) - [Sardonyx](https://gemfyi.com/gems/sardonyx/) - [Satin Spar](https://gemfyi.com/gems/satin-spar/) - [Scapolite](https://gemfyi.com/gems/scapolite/) - [Scheelite](https://gemfyi.com/gems/scheelite/) - [Schorl](https://gemfyi.com/gems/schorl/) - [Schorlomite](https://gemfyi.com/gems/schorlomite/) - [Schultenite](https://gemfyi.com/gems/schultenite/) - [Scolecite](https://gemfyi.com/gems/scolecite/) - [Scorzalite](https://gemfyi.com/gems/scorzalite/) - [Selenite](https://gemfyi.com/gems/selenite/) - [Sellaite](https://gemfyi.com/gems/sellaite/) - [Serandite](https://gemfyi.com/gems/serandite/) - [Seraphinite](https://gemfyi.com/gems/seraphinite/) - [Serendibite](https://gemfyi.com/gems/serendibite/) - [Serpentine](https://gemfyi.com/gems/serpentine/) - [Shattuckite](https://gemfyi.com/gems/shattuckite/) - [Sheen Obsidian](https://gemfyi.com/gems/sheen-obsidian/) - [Shortite](https://gemfyi.com/gems/shortite/) - [Siderite](https://gemfyi.com/gems/siderite/) - [Sillimanite](https://gemfyi.com/gems/sillimanite/) - [Simpsonite](https://gemfyi.com/gems/simpsonite/) - [Sinhalite](https://gemfyi.com/gems/sinhalite/) - [Smaragdite](https://gemfyi.com/gems/smaragdite/) - [Smithsonite](https://gemfyi.com/gems/smithsonite/) - [Smoky Quartz](https://gemfyi.com/gems/smoky-quartz/) - [Snowflake Obsidian](https://gemfyi.com/gems/snowflake-obsidian/) - [Sodalite](https://gemfyi.com/gems/sodalite/) - [Sogdianite](https://gemfyi.com/gems/sogdianite/) - [Sonolite](https://gemfyi.com/gems/sonolite/) - [Spessartine](https://gemfyi.com/gems/spessartine/) - [Sphalerite](https://gemfyi.com/gems/sphalerite/) - [Spinel](https://gemfyi.com/gems/spinel/) - [Spodumene](https://gemfyi.com/gems/spodumene/) - [Starlite](https://gemfyi.com/gems/starlite/) - [Star Ruby](https://gemfyi.com/gems/star-ruby/) - [Star Sapphire](https://gemfyi.com/gems/star-sapphire/) - [Staurolite](https://gemfyi.com/gems/staurolite/) - [Steatite](https://gemfyi.com/gems/steatite/) - [Stibiotantalite](https://gemfyi.com/gems/stibiotantalite/) - [Stichtite](https://gemfyi.com/gems/stichtite/) - [Strontianite](https://gemfyi.com/gems/strontianite/) - [Strontium Titanate](https://gemfyi.com/gems/strontium-titanate/) - [Sugilite](https://gemfyi.com/gems/sugilite/) - [Sulphur](https://gemfyi.com/gems/sulphur/) - [Sunstone (Aventurine feldspar)](https://gemfyi.com/gems/sunstone-aventurine-feldspar/) - [Sussexite](https://gemfyi.com/gems/sussexite/) - [Taaffeite (Magnesiotaaffeite)](https://gemfyi.com/gems/taaffeite-magnesiotaaffeite/) - [Talc](https://gemfyi.com/gems/talc/) - [Tantalite](https://gemfyi.com/gems/tantalite/) - [Tanzanite](https://gemfyi.com/gems/tanzanite/) - [Tavorite](https://gemfyi.com/gems/tavorite/) - [Tektite](https://gemfyi.com/gems/tektite/) - [Thaumasite](https://gemfyi.com/gems/thaumasite/) - [Thomsonite Subgroup](https://gemfyi.com/gems/thomsonite-subgroup/) - [Thulite](https://gemfyi.com/gems/thulite/) - [Tiger's Eye](https://gemfyi.com/gems/tigers-eye/) - [Tinzenite](https://gemfyi.com/gems/tinzenite/) - [Titanite (Sphene)](https://gemfyi.com/gems/titanite-sphene/) - [Topaz](https://gemfyi.com/gems/topaz/) - [Topazolite](https://gemfyi.com/gems/topazolite/) - [Tortoiseshell](https://gemfyi.com/gems/tortoiseshell/) - [Tourmaline](https://gemfyi.com/gems/tourmaline/) - [Transvaal Jade](https://gemfyi.com/gems/transvaal-jade/) - [Tremolite](https://gemfyi.com/gems/tremolite/) - [Triplite](https://gemfyi.com/gems/triplite/) - [Tsavorite](https://gemfyi.com/gems/tsavorite/) - [Tugtupite](https://gemfyi.com/gems/tugtupite/) - [Turquoise](https://gemfyi.com/gems/turquoise/) - [Ulexite](https://gemfyi.com/gems/ulexite/) - [Umbalite](https://gemfyi.com/gems/umbalite/) - [Unakite](https://gemfyi.com/gems/unakite/) - [Uvarovite](https://gemfyi.com/gems/uvarovite/) - [Variscite](https://gemfyi.com/gems/variscite/) - [Verdelite](https://gemfyi.com/gems/verdelite/) - [Verdite](https://gemfyi.com/gems/verdite/) - [Vesuvianite (Idocrase)](https://gemfyi.com/gems/vesuvianite-idocrase/) - [Villiaumite](https://gemfyi.com/gems/villiaumite/) - [Violane](https://gemfyi.com/gems/violane/) - [Viridine](https://gemfyi.com/gems/viridine/) - [Vivianite](https://gemfyi.com/gems/vivianite/) - [Wardite](https://gemfyi.com/gems/wardite/) - [Watermelon Tourmaline](https://gemfyi.com/gems/watermelon-tourmaline/) - [Water Opal (Jelly Opal)](https://gemfyi.com/gems/water-opal-jelly-opal/) - [Wavellite](https://gemfyi.com/gems/wavellite/) - [Wax Opal](https://gemfyi.com/gems/wax-opal/) - [Wernerite](https://gemfyi.com/gems/wernerite/) - [White Opal](https://gemfyi.com/gems/white-opal/) - [Whitlockite](https://gemfyi.com/gems/whitlockite/) - [Willemite](https://gemfyi.com/gems/willemite/) - [Williamsite](https://gemfyi.com/gems/williamsite/) - [Witherite](https://gemfyi.com/gems/witherite/) - [Wood Opal](https://gemfyi.com/gems/wood-opal/) - [Wulfenite](https://gemfyi.com/gems/wulfenite/) - [Xenotime](https://gemfyi.com/gems/xenotime/) - [Xonotlite](https://gemfyi.com/gems/xonotlite/) - [Yttrium Aluminium Garnet](https://gemfyi.com/gems/yttrium-aluminium-garnet/) - [Zektzerite](https://gemfyi.com/gems/zektzerite/) - [Zincite](https://gemfyi.com/gems/zincite/) - [Zircon](https://gemfyi.com/gems/zircon/) - [Zoisite](https://gemfyi.com/gems/zoisite/) ## Gem Origins - [Jegdalek, Afghanistan](https://gemfyi.com/origins/jegdalek-afghanistan/) - [Kagem Mine, Zambia](https://gemfyi.com/origins/kagem-mine-zambia/) - [Kashmir, India](https://gemfyi.com/origins/kashmir-india/) - [Lightning Ridge, Australia](https://gemfyi.com/origins/lightning-ridge-australia/) - [Luc Yen, Vietnam](https://gemfyi.com/origins/luc-yen-vietnam/) - [Mahenge, Tanzania](https://gemfyi.com/origins/mahenge-tanzania/) - [Merelani Hills, Tanzania](https://gemfyi.com/origins/merelani-hills-tanzania/) - [Minas Gerais, Brazil](https://gemfyi.com/origins/minas-gerais-brazil/) - [Mogok, Myanmar](https://gemfyi.com/origins/mogok-myanmar/) - [Montana, United States](https://gemfyi.com/origins/montana-usa/) - [Muzo, Colombia](https://gemfyi.com/origins/muzo-colombia/) - [Pailin, Cambodia](https://gemfyi.com/origins/pailin-cambodia/) - [Paraíba, Brazil](https://gemfyi.com/origins/paraiba-brazil/) - [Ratnapura, Sri Lanka](https://gemfyi.com/origins/ratnapura-sri-lanka/) - [Sri Lanka (Ceylon), Sri Lanka](https://gemfyi.com/origins/sri-lanka-ceylon/) ## Glossary - [4Cs](https://gemfyi.com/glossary/4cs/) - [Amorphous](https://gemfyi.com/glossary/amorphous/) - [Asterism](https://gemfyi.com/glossary/asterism/) - [Beryllium Diffusion](https://gemfyi.com/glossary/beryllium-diffusion/) - [Birefringence](https://gemfyi.com/glossary/birefringence/) - [Brilliant Cut](https://gemfyi.com/glossary/brilliant-cut/) - [Cabochon](https://gemfyi.com/glossary/cabochon/) - [Calibrated Stone](https://gemfyi.com/glossary/calibrated-stone/) - [Carat Weight](https://gemfyi.com/glossary/carat-weight/) - [Chatoyancy](https://gemfyi.com/glossary/chatoyancy/) - [Clarity Grade](https://gemfyi.com/glossary/clarity-grade/) - [Cleavage](https://gemfyi.com/glossary/cleavage/) - [Coating](https://gemfyi.com/glossary/coating/) - [Color Change](https://gemfyi.com/glossary/color-change/) - [Crystal Habit](https://gemfyi.com/glossary/crystal-habit/) - [Crystal System](https://gemfyi.com/glossary/crystal-system/) - [Dispersion](https://gemfyi.com/glossary/dispersion/) - [Faceting](https://gemfyi.com/glossary/faceting/) - [Fluorescence](https://gemfyi.com/glossary/fluorescence/) - [Fracture](https://gemfyi.com/glossary/fracture/) - [Fracture Filling](https://gemfyi.com/glossary/fracture-filling/) - [Gemological Certificate](https://gemfyi.com/glossary/gemological-certificate/) - [Heat Treatment](https://gemfyi.com/glossary/heat-treatment/) - [Inclusion](https://gemfyi.com/glossary/inclusion/) - [Irradiation](https://gemfyi.com/glossary/irradiation/) - [Luster](https://gemfyi.com/glossary/luster/) - [Melee](https://gemfyi.com/glossary/melee/) - [Mixed Cut](https://gemfyi.com/glossary/mixed-cut/) - [Mohs Hardness](https://gemfyi.com/glossary/mohs-hardness/) - [Optic Character](https://gemfyi.com/glossary/optic-character/) - [Origin Report](https://gemfyi.com/glossary/origin-report/) - [Play-of-Color](https://gemfyi.com/glossary/play-of-color/) - [Pleochroism](https://gemfyi.com/glossary/pleochroism/) - [Polariscope](https://gemfyi.com/glossary/polariscope/) - [Polymorph](https://gemfyi.com/glossary/polymorph/) - [Refractive Index](https://gemfyi.com/glossary/refractive-index/) - [Refractometer](https://gemfyi.com/glossary/refractometer/) - [Specific Gravity](https://gemfyi.com/glossary/specific-gravity/) - [Spectroscope](https://gemfyi.com/glossary/spectroscope/) - [Step Cut](https://gemfyi.com/glossary/step-cut/) - [Tenacity](https://gemfyi.com/glossary/tenacity/) - [Transparency](https://gemfyi.com/glossary/transparency/) - [Twinning](https://gemfyi.com/glossary/twinning/) ## Guides - [Alluvial Mining: Gemstones From Rivers](https://gemfyi.com/guide/alluvial-mining-gemstones-from-rivers/) - [Amethyst vs Alexandrite: Purple Gems Compared](https://gemfyi.com/guide/amethyst-vs-alexandrite/) - [Aquamarine vs Blue Topaz: Blue Gems Compared](https://gemfyi.com/guide/aquamarine-vs-blue-topaz/) - [Art Deco and Gemstones: A Design Revolution](https://gemfyi.com/guide/art-deco-gemstones-design-revolution/) - [Auction Houses and Secondary Markets](https://gemfyi.com/guide/auction-houses-and-secondary-markets/) - [Basic Gemstone Identification at Home](https://gemfyi.com/guide/basic-gemstone-identification-at-home/) - [Building a Gem Collection: Where to Start](https://gemfyi.com/guide/building-a-gem-collection/) - [Burmese Ruby: The Pigeon Blood Legacy](https://gemfyi.com/guide/burmese-ruby-pigeon-blood-legacy/) - [Caring for Jewelry Settings Over Time](https://gemfyi.com/guide/caring-for-jewelry-settings-over-time/) - [Choosing the Right Metal for Your Gem](https://gemfyi.com/guide/choosing-the-right-metal-for-your-gem/) - [Cleaning Methods for Different Gemstone Types](https://gemfyi.com/guide/cleaning-methods-for-gemstones/) - [Cleopatra's Emeralds: Gems of Ancient Egypt](https://gemfyi.com/guide/cleopatras-emeralds-gems-of-ancient-egypt/) - [Colombian Emeralds: From Muzo to Modern Markets](https://gemfyi.com/guide/colombian-emeralds-muzo-to-modern-markets/) - [Color in Gemstones: The Science of Chromophores](https://gemfyi.com/guide/color-in-gemstones-science-of-chromophores/) - [Crystal Systems Explained](https://gemfyi.com/guide/crystal-systems-explained/) - [Custom Design Process: From Sketch to Finished Piece](https://gemfyi.com/guide/custom-design-process-sketch-to-finished/) - [Diamond vs Moissanite: Which Should You Choose?](https://gemfyi.com/guide/diamond-vs-moissanite/) - [Emerald: The Green Fire](https://gemfyi.com/guide/emerald-the-green-fire/) - [Emerald vs Tsavorite: Green Gems Compared](https://gemfyi.com/guide/emerald-vs-tsavorite/) - [Engagement Ring Gemstone Alternatives to Diamond](https://gemfyi.com/guide/engagement-ring-gemstone-alternatives/) - [Estate Gems: Buying and Appraising Vintage Pieces](https://gemfyi.com/guide/estate-gems-buying-vintage-pieces/) - [Garnet: More Than Deep Red](https://gemfyi.com/guide/garnet-more-than-deep-red/) - [Gemstone Cuts and How They Affect Design](https://gemfyi.com/guide/gemstone-cuts-and-how-they-affect-design/) - [Gemstone Price Trends and Market Cycles](https://gemfyi.com/guide/gemstone-price-trends-and-market-cycles/) - [Gemstone Trade Routes: Silk Road to Modern Supply Chains](https://gemfyi.com/guide/gemstone-trade-routes-silk-road-to-modern/) - [General Gemstone Care Tips](https://gemfyi.com/guide/general-gemstone-care-tips/) - [How Diamonds Form Deep in the Earth](https://gemfyi.com/guide/how-diamonds-form-deep-in-the-earth/) - [How Gemstones Form in Nature](https://gemfyi.com/guide/how-gemstones-form-in-nature/) - [How Opals Form: Fire From Water](https://gemfyi.com/guide/how-opals-form-fire-from-water/) - [How Rubies and Sapphires Form](https://gemfyi.com/guide/how-rubies-and-sapphires-form/) - [How to Buy a Diamond: Complete Guide](https://gemfyi.com/guide/how-to-buy-a-diamond/) - [How to Buy Alexandrite: Complete Guide](https://gemfyi.com/guide/how-to-buy-alexandrite/) - [How to Buy Amethyst: Complete Guide](https://gemfyi.com/guide/how-to-buy-amethyst/) - [How to Buy an Emerald: Complete Guide](https://gemfyi.com/guide/how-to-buy-an-emerald/) - [How to Buy an Opal: Complete Guide](https://gemfyi.com/guide/how-to-buy-an-opal/) - [How to Buy Aquamarine: Complete Guide](https://gemfyi.com/guide/how-to-buy-aquamarine/) - [How to Buy a Ruby: Complete Guide](https://gemfyi.com/guide/how-to-buy-a-ruby/) - [How to Buy a Sapphire: Complete Guide](https://gemfyi.com/guide/how-to-buy-a-sapphire/) - [How to Buy Garnet: Complete Guide](https://gemfyi.com/guide/how-to-buy-garnet/) - [How to Buy Gemstones Online Safely](https://gemfyi.com/guide/how-to-buy-gemstones-online-safely/) - [How to Buy Tanzanite: Complete Guide](https://gemfyi.com/guide/how-to-buy-tanzanite/) - [How to Buy Topaz: Complete Guide](https://gemfyi.com/guide/how-to-buy-topaz/) - [How to Buy Tourmaline: Complete Guide](https://gemfyi.com/guide/how-to-buy-tourmaline/) - [How to Read a Gemstone Certificate](https://gemfyi.com/guide/how-to-read-a-gemstone-certificate/) - [Inclusions: Nature's Fingerprints](https://gemfyi.com/guide/inclusions-natures-fingerprints/) - [Investing in Colored Gemstones](https://gemfyi.com/guide/investing-in-colored-gemstones/) - [Jade in Chinese Culture: Five Thousand Years](https://gemfyi.com/guide/jade-in-chinese-culture/) - [Lab Reports Decoded: GIA, Gübelin, SSEF, and AGL](https://gemfyi.com/guide/lab-reports-decoded-gia-gubelin-ssef-agl/) - [Matching Gemstones for Multi-Stone Jewelry](https://gemfyi.com/guide/matching-gemstones-multi-stone-jewelry/) - [Metamorphic Gemstones Explained](https://gemfyi.com/guide/metamorphic-gemstones-explained/) - [Natural vs Lab-Grown Diamonds: Complete Comparison](https://gemfyi.com/guide/natural-vs-lab-grown-diamonds/) - [Opal: Play of Color and Formation](https://gemfyi.com/guide/opal-play-of-color-and-formation/) - [Opal vs Moonstone: Phenomenal Gems Compared](https://gemfyi.com/guide/opal-vs-moonstone/) - [Optical Properties: Refraction, Dispersion, and Pleochroism](https://gemfyi.com/guide/optical-properties-refraction-dispersion-pleochroism/) - [Organic Gems: Pearls, Amber, and Coral](https://gemfyi.com/guide/organic-gems-pearls-amber-coral/) - [Pearls in History: From Roman Luxury to Mikimoto](https://gemfyi.com/guide/pearls-in-history-roman-luxury-to-mikimoto/) - [Pearl vs Mother of Pearl: What Is the Difference?](https://gemfyi.com/guide/pearl-vs-mother-of-pearl/) - [Pegmatite Gems: Nature's Treasure Chests](https://gemfyi.com/guide/pegmatite-gems-natures-treasure-chests/) - [Precious vs. Semi-Precious: Understanding the Distinction](https://gemfyi.com/guide/precious-vs-semi-precious-gemstones/) - [Prong, Bezel, and Channel: Setting Styles Explained](https://gemfyi.com/guide/prong-bezel-channel-setting-styles/) - [Ring Anatomy: Understanding Jewelry Components](https://gemfyi.com/guide/ring-anatomy-jewelry-components/) - [Ruby: The King of Gemstones](https://gemfyi.com/guide/ruby-the-king-of-gemstones/) - [Ruby vs Garnet: How to Tell Them Apart](https://gemfyi.com/guide/ruby-vs-garnet/) - [Sapphire Beyond Blue: A Spectrum of Colors](https://gemfyi.com/guide/sapphire-beyond-blue/) - [Sapphire vs Tanzanite: Blue Gems Compared](https://gemfyi.com/guide/sapphire-vs-tanzanite/) - [Spinel: The Great Impostor Redeemed](https://gemfyi.com/guide/spinel-the-great-impostor-redeemed/) - [Spotting Synthetic and Treated Gemstones](https://gemfyi.com/guide/spotting-synthetic-and-treated-gemstones/) - [Storage and Protection for Gemstone Jewelry](https://gemfyi.com/guide/gemstone-storage-and-protection/) - [Storing and Insuring a Gem Collection](https://gemfyi.com/guide/storing-and-insuring-a-gem-collection/) - [Synthetic Gemstones: Lab-Grown vs. Natural](https://gemfyi.com/guide/synthetic-gemstones-lab-grown-vs-natural/) - [Tanzanite, Alexandrite, and Other Collector Stones](https://gemfyi.com/guide/tanzanite-alexandrite-collector-stones/) - [Tax, Import Duties, and Legal Considerations](https://gemfyi.com/guide/tax-import-duties-and-legal-considerations/) - [The 4 Cs of Gemstones: Beyond Diamonds](https://gemfyi.com/guide/the-4cs-of-gemstones/) - [The Black Prince's Ruby: A Spinel in Disguise](https://gemfyi.com/guide/the-black-princes-ruby-spinel-in-disguise/) - [The Cullinan Diamond: The Largest Gem-Quality Rough](https://gemfyi.com/guide/the-cullinan-diamond-largest-gem-quality-rough/) - [The Hope Diamond: A Cursed Blue Legend](https://gemfyi.com/guide/the-hope-diamond-cursed-blue-legend/) - [The Koh-i-Noor: From Mughal Treasure to Crown Jewel](https://gemfyi.com/guide/the-koh-i-noor-mughal-treasure-to-crown-jewel/) - [The Star of India: World's Largest Star Sapphire](https://gemfyi.com/guide/the-star-of-india-largest-star-sapphire/) - [Topaz vs Citrine: Yellow Gems Compared](https://gemfyi.com/guide/topaz-vs-citrine/) - [Tourmaline: The Rainbow Gem](https://gemfyi.com/guide/tourmaline-the-rainbow-gem/) - [Understanding Gemstone Pricing Factors](https://gemfyi.com/guide/understanding-gemstone-pricing-factors/) - [Understanding Gemstone Provenance and Certificates](https://gemfyi.com/guide/gemstone-provenance-and-certificates/) - [Understanding the Mohs Hardness Scale](https://gemfyi.com/guide/understanding-the-mohs-hardness-scale/) - [Volcanic Gemstones: Gems Born From Lava](https://gemfyi.com/guide/volcanic-gemstones-from-lava/) - [What Are Gemstones? A Complete Introduction](https://gemfyi.com/guide/what-are-gemstones/) ## Full Index - [XML Sitemap](https://gemfyi.com/sitemap.xml)