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Chloritoid

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GFM1015314

Chloritoid

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Description
Locality: 
Iwate Prefecture, Honshu Island, Japan
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2 × 0.8 cm
Description

Greenish brown thick-tabular pseudo-hexagonal free standig crystals to 4 mm, very rich on a Siderophyllite-Albite-Quartz. Pretty specimens of this uncommon Silicate.

Mineral Data
What's on the rock

Chloritoid

Formula: 
(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Strunz: 
9.AF.85
Hardness: 
6.5
Type Locality: 
Kosoi Brod Village, Ekaterinburg (Sverdlovsk), Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia...