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0 item @ $0.00  

Clinoclase with Cornwallite

#37600

Clinoclase with Cornwallite

#37600
Availability
Sold
Size
4 x 4 x 3.5 cm - Miniature 
Formula
Cu3AsO4(OH)3 (RRUFF)
Locality
Antelope mine, Sierra Co., California, United States
Tagged
arsenate , copper

Rich blue, characteristic color, of Clinoclase in 1mm crystals in several areas associated with Cornwallite (green).

Clinoclase

Formula
Cu3AsO4(OH)3 
Crystal System
Monoclinic 
Crystal Habit
Crystals rare, typically needlelike, tabular, as rosettes and radial fibrous spherical aggregates, as crusts and coatings. 
Cleavage
perfect 
Luster
Vitreous, pearly on cleavages 
Color
Dark greenish blue to greenish black; in transmitted light, blue-green. 
Streak
Bluish green 
Geological Setting
A rare secondary mineral in the oxidized zone of some arsenic-rich hydrothermal base-metal deposits. 
Class
2/m - Prismatic 
Fracture
Uneven 
Hardness
2.5 - 3 

Data courtesy of Webmineral.

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