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Grandidierite

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SKY1091740

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Description
Locality: 
Betroka District, Anosy, Madagascar
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 0.8 × 0.7 cm
Description

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

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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€10
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Start 02 Jan 18:00
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Spain
€6
Europe
€9
Rest of the World
€10

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