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Alluaudite

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CAM181770

Alluaudite

Description Tabs

Description
Locality: 
Helen Beryl Mine, Fourmile, Custer County, South Dakota, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 2.7 × 1.8 cm
Description

Brown massive alluaudite, an uncommon complex phosphate.

Mineral Data
What's on the rock

Alluaudite

Formula: 
(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Strunz: 
8.AC.10
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0
Type Locality: 
Varuträsk, Skellefteå, Västerbotten, Sweden
Cartils Minerals

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