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Staurolite

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PDM682155

Staurolite

Floater

Description Tabs

Description
Locality: 
Funda Biabo, Lubudi, Haut-Lomami, DR Congo
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1.1 × 0.4 cm
Description

From my own collection, this is a rare locality, star-like floater specimen with three twinned crystals of staurolite. Interpenetrated twins at 60° of two crystals, {231} twin, are sometime found in old collections, but this specimen with repeated twinning of three crystals is the only one I have seen.

Ex. Dr. Iván Blanco.

Mineral Data
What's on the rock

Staurolite

Formula: 
Fe2+2Al9O6(SiO4)4(O,OH)2
Strunz: 
9.AF.30
Crystal System: 
‎Monoclinic
Hardness: 
7.0 - 7.5
Colour: 
Brown

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