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Centennialite & Calumetite

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SKY751369

Centennialite & Calumetite

Rare Mineral

Description Tabs

Description
Locality: 
Rudna Mine, Gmina Polkowice, Polkowice County, Lower Silesian Voivodeship, Poland
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2 × 1 cm
Description

Blue crystals of the relatively new mineral centennialite (IMA 2013-110) associated to minoritary green calumetite both associated to perfect halite cubes (photo 5).

Centennialite has only been found in two localities worldwide.

Centennialite crystals from this new find in Poland are probably better than the ones found at the type locality.

 

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

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