Copper

  

Origin: Mass Mine, Ontanogan County, Michigan, U.S.A.

Ex. Keith Hayes coll.

Sample size: 2.1 x 1.6 x 1.0 cm

 

  

Interesting specimen of native copper (unusual at Tsumeb)on 1 side and pyrite on the other side. The native copper is crystal and crystalline with the largest crystals about 0.1 cm and the pyrite crystals are up to about 0.1 cm.

Origin: Tsumeb Mine, Tsumeb, Namibia

Ex. Keith Hayes coll.

Sample size: 4.9 x 2.7 x 1.1 cm

 

Photo courtesy of: 

 

  

This specimen was from a small but well-studied and known find of crystallized copper with a microlayer of GOLD admixed, that gives it a brassy sheen! It is not crystallized gold, but gold is there.

Origin: Andacollo Mine, Andacollo, Copiapó, Atacama Province, Chile

Sample size: 6.7 x 3.5 x 3 cm

 

  

Origin: Ray Mine, Ray, Arizona, U.S.A.
Ex. Ed David Collection

Sample size: 11 x 9 x 1 cm

 

  

Origin: Calumet Mine, Houghton County, Michigan
ex. Bixby, Chicago Field Museum, Ed David collections

Sample size: 18.2 x 14.5 x 6.8 cm (WEIGHT: 1 kilo)

 

  

Copper pseudomorph after aragonite

Origin: Corocoro District, Pacajes Province, La Paz Department, Bolivia

Sample size: 2.3 x 2.2 x 2.0 cm

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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