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0 item @ $0.00  

Atacamite with Nantokite

#PD36693

Atacamite with Nantokite

#PD36693
Availability
Sold
Size
5 x 4 x 2.5 cm - Miniature 
Formula
Cu2Cl(OH)3 (RRUFF)
Locality
Balmat, St. Lawrence Co., New York, United States
Tagged
copper

A good representative specimen of mostly Chalcocite matrix covered with a fine alteration of green Atacamite and Nantokite. Nantokite is typically colorless but changes to green after exposure to light.

Atacamite

Formula
Cu2Cl(OH)3 
Crystal System
Orthorhombic 
Crystal Habit
Euhedral Crystals, Fibrous, Granular 
Cleavage
Perfect, None, None 
Luster
Adamantine 
Color
green, yellow, yellow green, black green 
Streak
apple green 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
3-3.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
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