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Durangite Hematite & Cassiterite

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MGR781725

Durangite Hematite & Cassiterite

Description Tabs

Description
Locality: 
Thomas Range, Juab County, Utah, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1 × 0.8 cm
Description

This is an out-standing rarity. The type-locality is Durango in Mexico, Utah is one of only 5 localities world-wide which produced this mineral and from Utah they are even more rare than from Durango. The durangite shows brick-red color and fine contrast to very dark hematite matrix. Should be high valued for rarity!

Mineral Data
What's on the rock

Durangite

Formula: 
NaAl(AsO4)F
Strunz: 
8.BH.10
Hardness: 
5.5
Type Locality: 
Barranca Mine, Coneto de Comonfort, Mun. de Coneto de Comonfort, Durango, Mexico

Hematite

Formula: 
Fe2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
5.0 - 6.0

Cassiterite

Formula: 
SnO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal
Hardness: 
6.0 - 7.0
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