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Quartz Dravite & Rutile

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MGR559204

Quartz Dravite & Rutile

Description Tabs

Description
Locality: 
Diamantina, Minas Gerais, Brazil
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.6 × 3.5 × 2.4 cm
Description

A crystal in finest quality - all faces show highest possible luster and wonderful structure, complete and sharp terminated all around. The crystal is water clear and shows inclusions of thin (diameter of a hair) crystals of dark (nearly black to red-brown) dravite crystals. Attachted to one smaller inter rgown quartz crystal you can see a small group of exposed rutile var sagenite. Rutile is dark red and highly lustrous, too. Inclusions, luster and texure are nearly impossible to photograph, so please note that this specimen is so much better in person! Undamaged.

Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
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

Rutile

Formula: 
TiO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal - Ditetragonal Dipyramidal
Hardness: 
6.0 - 6.5
Type Locality: 
Rutile locality, Horcajuelo de la Sierra, Madrid, Spain
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