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16.4.5: Goshenite

Last updated

May 6, 2022
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- 16.4.4: Vanadium Beryl
- 16.4.6: Green Beryl

gemology
Gemology Project

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Goshenite
Chemical composition	Be₃Al₂(SiO₃)₆Beryllium aluminum silicate
Crystal system	Hexagonal
Habit	Prismatic
Cleavage	Poor, basal
Fracture	Conchoidal to uneven
Hardness	7.5
Optic nature	Uniaxial -
Refractive index	1.57 - 1.59
Birefringence	0.004 - 0.009
Dispersion	Low, 0.014
Specific gravity	2.7 - 2.9
Lustre	Vitreous
Pleochroism	None

File:Béryl var. goshénite 1 (Chine) .jpg

Figure $\PageIndex{1}$ : Colorless Goshenite
Xuebaoding, Pingwu, Sichuan Province, China

Goshenite is the colorless variety of beryl and is named after Goshen in Hampshire County, Massachusetts, USA (one of the localities where this gem is found).

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