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Straczekite Duttonite & Fervanite

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ESM823610

Straczekite Duttonite & Fervanite

Type Locality

Description Tabs

Description
Locality: 
Union Carbide Mine, Wilson Springs, Garland County, Arkansas, United States of America
Class: 
Combination
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2 × 1 cm
Description

Lustrous black straczekite crystals with beige duttonite crystals and brown fervanite on matrix  ( For original close-up photo contact us )

Mineral Data
What's on the rock

Straczekite

Formula: 
(Ca,K,Ba)(V5+,V4+)8O20·3H2O
Strunz: 
4.HE.20
Hardness: 
1.0 - 2.0
Type Locality: 
North Wilson pit, Union Carbide Mine, Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA

Duttonite

Formula: 
V4+O(OH)2
Strunz: 
4.HE.35
Hardness: 
2.5 - 0.0
Type Locality: 
Peanut Mine, Bull Canyon, Uravan District, Montrose Co., Colorado, USA

Fervanite

Formula: 
Fe3+4V5+4O16·5H2O
Strunz: 
4.HG.05
Hardness: 
0.0
Type Locality: 
Polar Mesa, Polar Mesa District (Polar Mesa), Grand Co., Utah, USA