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Cumengeite

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MMM84846

Cumengeite

Description Tabs

Description
Locality: 
Cuddrabridge Mine, Gunver Head, Padstow, Cornwall, United Kingdom
Size Range: 
Thumbnail (1-3cm)
Size: 
0.7 × 2.5 × 1 cm
Description

Quartz matrix richly covered on one side with blue micro crystalline cumengeite and a few tabular phosgene crystals.

Comes with an early Ian Bruce 'crystal classics' collection label, collected in 1990.

Mineral Data
What's on the rock

Cumengeite

Formula: 
Pb21Cu20Cl42(OH)40·6H2O
Strunz: 
3.DB.20
Crystal System: 
Tetragonal
Hardness: 
2.5
Streak: 
Sky-blue
Type Locality: 
Santa Rosalía (El Boleo), Boleo District, Mun. de Mulegé, Baja California Sur (BC Sur), Mexico