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Muscovite Psm Dravite

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KRM646361

Muscovite Psm Dravite

Description Tabs

Description
Locality: 
Shigar Valley, Gilgit-Baltistan, Pakistan
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 4.5 × 4.2 cm
Description

A superb nice unusual pseudomorph example of  muscovite after well terminated schorl crystal , no damage , a very good high quality specimen inperson. Seller's personal collection.

Mineral Data
What's on the rock

Muscovite

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

Dravite

Formula: 
Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Crystal System: 
Trigonal
Hardness: 
7.0
Type Locality: 
Dobrova, Dravograd (Unterdrauburg), Slovenia
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