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Margarite & Dravite

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CR30801

Margarite & Dravite

With Antique Label

Description Tabs

Description
Locality: 
Chester Emery Mines, Hampden County, Massachusetts, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5.5 × 4 cm
Description

Very rich specimen of crystallized margarite with intergrown brown dravite crystals.

Specimen comes with 2 nice old labels.

Mineral Data
What's on the rock

Margarite

Formula: 
CaAl2(Al2Si2O10)(OH)2
Strunz: 
9.EC.30
Hardness: 
4.0
Type Locality: 
Großer Greiner, Zemmgrund, Zillertal, North Tyrol, Tyrol, Austria

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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