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Ulexite

#PD34264
SOLD
Ulexite from Boron, Kern Co., California, United States - PD34264
Ulexite from Boron, Kern Co., California, United States - PD34264

Ulexite

#PD34264
Availability
Sold
Size
6 x 4 x 3.5 cm - Sm Cabinet 
Formula
NaCaB5O6(OH)6·5H2O (RRUFF)
Locality
Boron, Kern Co., California, United States

Solid piece of satiny-white Ulexite composed of tightly compact optical fiber-like crystals.

The Boron mine in Kern Co., California is a large open pit mine, the largest in California and likely the largest Borate mine in the World, that has been mined since the deposit's discovery in the 1920's.

Ulexite

Formula
NaCaB5O6(OH)6·5H2O 
Crystal System
Triclinic 
Crystal Habit
Acicular, Fibrous, Capillary 
Cleavage
Perfect, Perfect, None 
Luster
Chatoyant 
Color
colorless, white 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle 
Hardness
2.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
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