Phenakite

Add one script tag to your page:

<div data-gemfyi="entity" data-slug="phenakite"></div>
<script src="https://cdn.jsdelivr.net/npm/gemfyi-embed@1/dist/embed.min.js" defer></script>

Embed as an iframe:

<iframe src="https://gemfyi.com/iframe/entity/phenakite/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>

Paste the URL in WordPress, Medium, or Ghost:

https://gemfyi.com/zh-hans/gems/phenakite/

Shields.io-compatible SVG badge:

![Phenakite](https://gemfyi.com/badge/entity/phenakite.svg)

Web Component:

<gemfyi-entity slug="phenakite"></gemfyi-entity>
<script src="https://cdn.jsdelivr.net/npm/gemfyi-embed@1/dist/embed.min.js" defer></script>

Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 7.5 – 8.0

Specific Gravity 2.9 – 2.98

Refractive Index 1.65 – 1.695

Crystal System Trigonal

Luster Vitreous

Fracture Conchoidal

Color various

Birefringence 0.016

Dispersion 0.015

Pleochroism Distinct: colorless - orangy-yellow

Mohs Hardness

Mohs hardness of Phenakite shown against the ten reference minerals, from talc (1) to diamond (10).

Mohs	Reference mineral	Phenakite
1	Talc
2	Gypsum
3	Calcite
4	Fluorite
5	Apatite
6	Orthoclase
7	Quartz
8	Topaz	●
9	Corundum
10	Diamond

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

Where to Buy Phenakite

Blue Nile Fine jewelry retailer

James Allen Gemstone jewelry

Brilliant Earth Ethically sourced gems

Amazon Wide selection

Links may earn a commission at no extra cost to you.

Treatments

Colorless material has been reported to turn a yellow-brown color on irradiation (Pough and Rogers, 1947). One could expect this change to be reversed by heating - Nassau (1984) 7.5 to 8Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 2.90 to 2.98Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references BrittleArthur Thomas, Gemstones (2009) GoodWalter Schumann, Gemstones of the world (2001) More from other references ConchoidalWalter Schumann, Gemstones of the world (2001) 1.650 to 1.695Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Uniaxial/+Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 0.016Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Distinct: colorless - orangy-yellowHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) 0.015Arthur Thomas, Gemstones (2009) Colourless, yellowish, pink, greenish blueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references VitreousArthur Thomas, Gemstones (2009) Inert to weak greenish, blue, pinkHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Specimens show a distinct blueMichael O?Donoghue, Gems, Sixth Edition (2006) TrigonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Rhombohedral, tabular to prismatic crystalsMichael O?Donoghue, Gems, Sixth Edition (2006) More from other references Phenakite occurs in granite pegmatites.Michael O?Donoghue, Gems, Sixth Edition (2006) More from other references (Veils of) 2-phase inclusions, rutile needles - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 4 Phenakite information at mindat.org Austria  France  Myanmar  Russia  Sri Lanka  USA  Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 437

About Phenakite

硅铍石是一种稀有的铍硅酸盐矿物，化学式为Be2SiO4，名称来自希腊语phenax，意为骗子，因其无色透明的外观历史上被误认为石英或金刚石。宝石级硅铍石极为透明，折射率高（1.654至1.670），色散值（0.015）与祖母绿相近，切磨后具有良好的光泽和亮度，颇具钻石替代品潜力。摩氏硬度7.5至8，无解理，韧性较好，是宝石性能优秀的品种。主要产地包括俄罗斯（乌拉尔，产高品质大晶体）、巴西、斯里兰卡、缅甸、坦桑尼亚和美国（科罗拉多州）。市场稀缺，主要面向宝石收藏家。

On this page