Gemstone Formation & Geology
How gemstones form deep within the Earth and reach the surface. Explore the geological processes — from volcanic eruptions to metamorphic pressure — that create the world's most beautiful crystals.
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How Diamonds Form Deep in the Earth
From 150 kilometers below to your jewelry box
835 words
4 min read
How Rubies and Sapphires Form
Same mineral, different colors — the geology of corundum
832 words
4 min read
Volcanic Gemstones: Gems Born From Lava
Peridot, obsidian, and the gems that ride magma to the surface
814 words
4 min read
Metamorphic Gemstones Explained
How heat and pressure transform ordinary rock into precious gems
893 words
4 min read
How Opals Form: Fire From Water
The only gemstone born from ancient groundwater
827 words
4 min read
Organic Gems: Pearls, Amber, and Coral
Gemstones produced by living organisms, not geological processes
828 words
4 min read
Pegmatite Gems: Nature's Treasure Chests
The geological environments that produce the world's largest and rarest crystals
876 words
4 min read
Alluvial Mining: Gemstones From Rivers
How rivers concentrate gems and why alluvial stones are often the finest
949 words
4 min read