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Beryl var. emerald

#AH51855

Beryl var. emerald

#AH51855
Availability
Sold
Size
6 x 4 x 2.5 cm - Sm Cabinet 
Formula
Be3Al2Si6O18 (RRUFF)
Locality
Dayakou emerald mine, Malipo Co., Wenshan, Yunnan Province, China
Tagged
beryllium

Green, not gemmy, emerald Beryl crystals. The largest is 3.4cm. The deposit is, according to Mindat, quartz and pegmatite veins intruding metamorphosed Cambrian age rock. It is unclear though if the Beryl is metasomatic in the schists (this matrix) or simplied carry in magma with the pegmatite veins. Maybe it is a little of both.

Beryl

Formula
Be3Al2Si6O18 
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Coarse, Prismatic, Columnar 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
green, blue, yellow, colorless, pink 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5-8 

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Beryl
On Dakota Matrix
Other Available Beryl
WebMineral
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Mindat
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