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Chalcophyllite & Brochantite

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JYJ910022

Chalcophyllite & Brochantite

Description Tabs

Description
Locality: 
Geister Vein, Rovnost Mine, Jáchymov, Karlovy Vary Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 3.5 × 2.8 cm
Description

Green hexagonal sheeted chalcophyllite with dark green brochantite groups and minor plumbogummite.

SEM-EDS, Raman  confirmed specimen no MA1534. Comes with a colour printed analysis. 

 

Mineral Data
What's on the rock

Chalcophyllite

Formula: 
Cu18Al2(SO4)3(AsO4)3(OH)27·33H2O
Strunz: 
8.DF.30
Crystal System: 
Trigonal
Hardness: 
2.0

Brochantite

Formula: 
Cu4(SO4)(OH)6
Strunz: 
7.BB.25
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0
Type Locality: 
Mednorudyanskoye Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia...