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Marumoite

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SKY570438

Marumoite

Rare Mineral

Description Tabs

Description
Locality: 
Okoppe Mine, Aomori Prefecture, Honshu Island, Japan
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.15 × 0.1 × 0.1 cm
Description

Metallic acicular crystals of the extremely rare sulphosalt mineral marumoite, many of them included in a colorless baryte crystal and also associated to brown sphalerite crystals.

Only two localities known worldwide, being the type locality Lengenbach.

Mineral Data
What's on the rock

Marumoite

Formula: 
Pb32As40S92
Strunz: 
2.HC.05g
Hardness: 
0.0
Colour: 
Lead grey
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

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