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Topaz On Quartz With Ilmenorutile

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CLB113865

Topaz On Quartz With Ilmenorutile

Technical University Freiberg, acquired 1967 from Klingenthal
Gem Crystal

Description Tabs

Description
Locality: 
Schneckenstein, Kielberg, Klingenthal, Vogtland, Saxony, Germany
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.3 × 6 × 5.8 cm
Largest Crystal: 
0.80cm
Description

Real good specimen with oned excellent topaz crystal (among others) between fine rock crystals. Greenish black ilmenorutile in matrix. With old typed labels.

Mineral Data
What's on the rock

Topaz

Formula: 
Al2(SiO4)(F,OH)2
Strunz: 
9.AF.35
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
8.0
Streak: 
White

Quartz

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

Ilmenorutile

Variety Of: 

Rutile

Formula: 
TiO2
Strunz: 
4.DB.05
Hardness: 
6.0 - 6.5
Formula: 
Fex(Nb,Ta)2x·4Ti1-xO2
Crystal System: 
Tetragonal
Hardness: 
6.0 - 6.5
Colour: 
Black
Type Locality: 
Vein No. 140 (Selyankino village), Buldym Lake, Vishnevye Mts (Vishnyovye; Cherry), Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

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