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0 item @ $0.00  

Chrysocolla

#21336

Chrysocolla

#21336
Availability
Sold
Size
3.5 x 4 x 0.5 cm - Miniature 
Formula
(Cu,Al)2H2Si2O5(OH)4·nH2O (RRUFF)
Locality
79 mine, Gila Co., Arizona, United States
Notes
Discounts/Promos do NOT apply to this item

These specimens were originally thought to be McGuinnessite, but after a little XRD and general tests proved to be nothing more than a fancy Chrysocolla perhaps a pseudomorph after McGuinnessite.

Chrysocolla

Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Crystal System
Orthorhombic 
Crystal Habit
Botryoidal, Earthy, Stalactitic 
Cleavage
None, None, None 
Luster
Vitreous - Dull 
Color
green, bluish green, blue, blackish blue, brown 
Streak
light green 
Class
Orthorhombic 
Fracture
Brittle - Sectile 
Hardness
2.5-3.5 

Data courtesy of Webmineral.

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