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Dravite

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ESM692152

Dravite

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Description
Locality: 
Sierra del Chivato, Santa Cruz, Santa Cruz Municipality, Sonora, Mexico
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 1.2 × 1 cm
Description

A spray of black parallel grown dravite crystals

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
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