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Rutile & Uvite

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CHA779735

Rutile & Uvite

Classic Locality

Description Tabs

Description
Locality: 
Pomba Pit, Serra das Éguas, Brumado, Bahia, Brazil
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.2 × 1.1 cm
Description

specimen with some nice black prismatic crystals of rutile with associate some tiny greenish crystals of uvite on matrix.

For value the dimension of the crystals I remenber you that the photos of my specimens are taken at only 20/40 enlargement! 

Mineral Data
What's on the rock

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

Uvite

Formula: 
Ca(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
Group Parent: 
Tourmaline
Crystal System: 
Trigonal
Hardness: 
7.5
Colour: 
Black, greenish-black
Streak: 
Light-brown, light-green, or white

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