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Alluaudite

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PDM768224

Alluaudite

Description Tabs

Description
Locality: 
Buranga Pegmatite, Gatumba, Ngororero District, Western Province, Rwanda
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.1 × 1.7 × 1.4 cm
Description

Aggregate of brown thick interpenetrated crystals of alluaudite with golden-green reflexes and good lustre.

The sample was collected in 1966 by professor Albert Delvaux (1919-1998).

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

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