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Robertsite & Hureaulite

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SER784817

Robertsite & Hureaulite

Description Tabs

Description
Locality: 
Sandamap Pegmatite, Sandamap North Farm 115, Dâures, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 2.9 × 2.5 cm
Description

wonderful , large, dark red robertsite rosettes with pink hureaulite

Mineral Data
What's on the rock

Robertsite

Formula: 
Ca3Mn3+4(PO4)3O2·3H2O
Strunz: 
8.DH.30
Hardness: 
3.5
Streak: 
Red-brown
Type Locality: 
Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA

Hureaulite

Formula: 
(Mn,Fe)5(PO4)2(HPO4)2·4H2O
Strunz: 
8.CB.10
Hardness: 
5.0
Type Locality: 
Les Hureaux, Saint-Sylvestre, Haute-Vienne, Limousin, France