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Osumilite

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MEX727559

Osumilite

Classic Locality

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Description
Locality: 
Funtanafigu Quarry, Marrubiu, Mount Arci, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4.2 × 1.5 cm
Weight: 
39.00gr
Description

A lot of black, high lustrous, hexagonal osumilite on matrix.

Mineral Data
What's on the rock

Osumilite

Formula: 
(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30
Strunz: 
9.CM.05
Hardness: 
5.0 - 6.0
Colour: 
Blue
Type Locality: 
Sakkabira, Osumi Peninsula, Kagoshima Prefecture, Kyushu Region, Japan
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