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Topaz Fluorite & Bixbyite

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SER959160

Topaz Fluorite & Bixbyite

Description Tabs

Description
Locality: 
Thomas Range, Juab County, Utah, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.7 × 1.2 cm
Description

some cognac topaz with a cluster of cubic, purple fluorite crystals and a good, black, lustrous bixbyite crystal

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

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Bixbyite

Formula: 
Mn3+2O3
Strunz: 
4.CB.10
Hardness: 
6.0 - 6.5
Colour: 
Black
Streak: 
Black
Type Locality: 
Maynard's claim (Pismire Knolls), Thomas Range, Juab Co., Utah, USA...