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Jeremejevite Pseudobrookite Topaz

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SMM778827

Jeremejevite Pseudobrookite Topaz

Description Tabs

Description
Locality: 
Wannenköpfe Quarry, Ochtendung, Maifeld, Mayen-Koblenz, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 1.5 cm
Description

Nice pale blue urchin of jeremejevite crystals,colorless glassy sharp crystals of topaz, shiny dark pseudobrookite and yellow crystals of a mineral of the 'Amphibole Supergroup'  probably enstatite .

Boxed with Label
Mineral Data
What's on the rock

Jeremejevite

Formula: 
Al6(BO3)5(F,OH)3
Strunz: 
6.AB.15
Crystal System: 
Hexagonal
Hardness: 
7.0
Type Locality: 
Soktuj Gora (Mount Soktuj), Adun-Cholon Range, Nerchinsk Gem mines, Nerchinsk (Nertschinsk), Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia...

Pseudobrookite

Formula: 
Fe2TiO5
Strunz: 
4.CB.15
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
6.0
Streak: 
Brown
Type Locality: 
Uroi Hill (Arany Hill), Simeria, Hunedoara Co., Romania

Topaz

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

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