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Allactite

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CR127857

Allactite

Type Locality
Rare Mineral

Description Tabs

Description
Locality: 
Moss Mine, Nordmark, Filipstad, Värmland County, Sweden
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.8 × 4 × 2.4 cm
Description

Very rich specimen of gemmy allactite crystals on matrix from the type locality. With minor black hematolite.

Ex Naturhistoriska Riksmuseet Stockholm - with original label.

RARE and old specimen !

Mineral Data
What's on the rock

Allactite

Formula: 
Mn2+7(AsO4)2(OH)8
Strunz: 
8.BE.30
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Moss mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden