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Grandidierite

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