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Holfertite & Topaz

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SHS521925

Holfertite & Topaz

Description Tabs

Description
Locality: 
Starvation Canyon, Thomas Range, Juab County, Utah, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 1.5 cm
Description

Nice yellow holfertite crystals on topaz

Mineral Data
What's on the rock

Holfertite

Formula: 
CaxU6+2-xTi(O8-xOH4x)·3H2O
Strunz: 
4.GB.70
Hardness: 
4.0 - 0.0
Type Locality: 
Holfertite pit, Starvation Canyon (Searles Canyon), Thomas Range, Juab Co., Utah, USA

Topaz

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