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Chloritoid

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PDM741837

Chloritoid

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Description
Locality: 
Robledillo de la Jara, Madrid, Spain
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.8 × 2.7 × 0.8 cm
Description

Euhedral crystals of chloritoid with a pseudohexagonal habitus, included in the slate matrix of Ordovician age. We cleaved many rock pieces along the foliation planes and not many good specimens such as this were found.

This crystal is quite well exposed and it has been in my collection since I collected in a field trip in May/1996.

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...

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