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Dravite

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CR135687

Dravite

Description Tabs

Description
Locality: 
Power's Farm, Pierrepont, St Lawrence County, New York, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 5 × 5 cm
Largest Crystal: 
1.30cm
Description

This specimen, from a classic locality from the New York state, show well formed by a short prism and the terminal flattened rhombohedron faces of dravite, which are well defined with a good luster. With two old labels wrongly marked as schorl.

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