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Centennialite & Calumetite On Copper

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JYJ709985

Centennialite & Calumetite On Copper

Description Tabs

Description
Locality: 
Centennial Mine, Centennial, Houghton County, Michigan, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 2.5 × 1.7 cm
Description

Clear blue centennialite with pale greenish anthonyite and pale blue calumetite as grainy masses. Associated with native copper. 

Very rare!

Mineral Data
What's on the rock

Centennialite

Formula: 
CaCu3Cl2(OH)6·nH2O (n ~ 0.7)
Hardness: 
0.0
Type Locality: 
Centennial Mine, Centennial, Houghton Co., Michigan, USA

Calumetite

Formula: 
Cu(OH,Cl)2·2H2O
Strunz: 
3.DA.40
Hardness: 
2.0
Type Locality: 
Centennial Mine, Centennial, Houghton Co., Michigan, USA

Copper

Formula: 
Cu
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0