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Grandidierite

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SKY941371

Grandidierite

Rare Mineral

Description Tabs

Description
Locality: 
Cap Andrahomana, Andranobory, Taolañaro, Anosy, Madagascar
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.8 × 1.3 × 0.6 cm
Description

Single crystal group of the rare borate mineral grandidierite from one of the classic localities for the mineral.

Ex Vandenbroucke Museum collection from Waregem, Belgium.

Mineral Data
What's on the rock

Grandidierite

Formula: 
(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Strunz: 
9.AJ.05
Hardness: 
7.5
Type Locality: 
Cap Andrahomana, Ranopiso Commune, Taolañaro District (Fort Dauphin), Anosy Region (Fort Dauphin Region), Tuléar Province (Toliara), Madagascar

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