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Algodonite

#RW51307
SOLD
Algodonite from Mohawk mine, Keweenaw Co., Michigan, United States - RW51307
Algodonite from Mohawk mine, Keweenaw Co., Michigan, United States - RW51307

Algodonite

#RW51307
Availability
Sold
Size
8 x 5.5 x 6 cm - Sm Cabinet 
Formula
Cu1-xAsx; x = 1/7 (RRUFF)
Locality
Mohawk mine, Keweenaw Co., Michigan, United States

Rich specimen of this copper arsenide with arborescent growth in Calcite. When fresh it is a steely grey, but as the photos show the Algodonite that is exposed is tanished to a yellowish brown color. The white matrix is Calcite. Algodonite from the Keweenaw is increasingly rare on the market and uncommon worldwide.

Algodonite

Formula
Cu1-xAsx; x = 1/7 
Crystal System
Hexagonal 
Crystal Habit
Massive - Granular, Tarnishes 
Cleavage
None, None, None 
Luster
Metallic 
Color
gray, silver white, steel gray, tarnishes dull bronze 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
4 

Data courtesy of Webmineral.

Collection
Robert J. Waidler Collection
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