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Dravite & Muscovite

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Dravite & Muscovite

Classic Locality

Description Tabs

Description
Locality: 
May Downs Station, Mount Isa City Shire, Queensland, Australia
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 4.5 × 3.8 cm
Largest Crystal: 
7.50cm
Description

Very sttractive, shiny 'stepped growth' dravite crystal aggregate with some muscovite. You don't see the stepped dravites from May Downs as often as the plain crystals from Yinniethara.

Mineral Data
What's on the rock

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

Muscovite

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

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