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0 item @ $0.00  

Chrysoberyl var. alexandrite

#46436

Chrysoberyl var. alexandrite

#46436
Availability
Sold
Size
2 x 2 x 1.5 cm - Thumbnail 
Formula
BeAl2O4 (RRUFF)
Locality
Novello mine, Fort Victoria, Masvingo dist., Zimbabwe
Tagged
beryllium

The specimen is actually green with some crude crystal faces. This is the variety of Chrysoberyl called alexandrite, which is color changing depending on the lights used. It is green with sun and appears purple with incandescent and halogen lights as these photos show.

Chrysoberyl

Formula
BeAl2O4 
Crystal System
Orthorhombic 
Crystal Habit
Twinning Common, Prismatic, Tabular 
Cleavage
Distinct, Imperfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
blue green, brown, brownish green, green, gray 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
8.5 

Data courtesy of Webmineral.

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