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Clinoclase & Chalcophyllite

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TRN779792

Clinoclase & Chalcophyllite

Classic Locality

Description Tabs

Description
Locality: 
Cathedral Mine, Busveal, St Day, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
2 × 2 × 5 cm
Largest Crystal: 
0.50cm
Description

Patches of Clinoclase and Chalcophyllite crystals in iron stained quartz. 

Mineral Data
What's on the rock

Clinoclase

Formula: 
Cu3(AsO4)(OH)3
Strunz: 
8.BE.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Type Locality: 
Wheal Gorland, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK

Chalcophyllite

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

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