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Alkali-beryl

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WND863869

Alkali-beryl

Description Tabs

Description
Locality: 
Deo Darrah, Khash & Keran Wa Munjan, Badakhshan Province, Afghanistan
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 1.8 × 1.1 cm
Description

This is a fine cluster with well developed, sky-blue crystals of  Alkali Beryl from Deo Darrah in Afghanistan. The crystals are well striated,  lustrous, sharp and mostly excellent terminated. The terminations are showing slightly frayed tips, but they are largely perfect. These were originally thought to be Rosterite or Vorobyevite, but further analysis by Dr. Federico Pezzotta of Milano confirmed they are alkali-rich Beryls. 

Mineral Data
What's on the rock

Alkali-beryl

Variety Of: 

Beryl

Formula: 
Be3Al2(Si6O18)
Strunz: 
9.CJ.05
Hardness: 
7.5 - 8.0
Hardness: 
0.0
Wendel Minerals

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