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Schorl & Sericite

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MNR807228

Schorl & Sericite

ex. Milan Okruhlica

Description Tabs

Description
Locality: 
Tsana, Mestia-Racha District, Racha-Lochkhumi-Kvemo Svaneti Region, Georgia
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10.7 × 7.7 × 7.5 cm
Largest Crystal: 
1.60cm
Description

Large sample of schorl in association with sericite. The locality is described as Caucasus Mountains, more investigation on precise locality would be required.

This is old sample from Milan Okruhlica collection.

 

Mineral Data
What's on the rock

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0

Sericite

Variety Of: 

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Hardness: 
0.0