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Grandidierite

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BMM1171639

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Description
Locality: 
Betroka District, Anosy, Madagascar
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.5 × 1.1 cm
Description

A single large blue grandidierite crystal with a lustrous surface and fine longitudinal striations. Under backlighting, the crystal displays an intense blue-green color that is much more vivid in person than shown in the photo (second photo). The specimen originates from the systematic collection of Albert Strasser and was acquired in 1979. The original Albert Strasser collection label is included.

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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Shipping Information

Postage Area Price
Austria
7
EU
19
Rest of Europe
21
USA, Canada, Japan, 1 kg
28
Australia, New Zealand, 1 kg
33