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Durangite With Cassiterite

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QRI640958

Durangite With Cassiterite

Former "Jim" Thomas collection
Rare Mineral

Description Tabs

Description
Locality: 
Thomas Range, Juab County, Utah, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 1.4 × 2.1 cm
Weight: 
17.00gr
Description

A botroidal aggregate with rare brick red durangite crystals associated to small jet black cassiterite crystals. Best appreciated with a 10x magnification. A very rare specimen from Thomas Range, now very difficult to find on the market but in old collection.

From the former 'Jim' Thomas collection, it comes in its original box.

Boxed with Label
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

Cassiterite

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

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