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Boltwoodite & Gypsum

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RAF62878

Boltwoodite & Gypsum

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Description
Locality: 
Rössing Uranium Mine, Arandis, Erongo Region, Namibia
Size Range: 
Cabinet (10-18 cm)
Size: 
4.5 × 13.5 × 5 cm
Largest Crystal: 
1.10cm
Description

Boltwoodite & gypsum from the Rossing Mine in Swakopmund area. Very little is coming out these days.

A nice specimen. Scarce with gypsum.

Weight: 253 gr.

Mineral Data
What's on the rock

Boltwoodite

Formula: 
(K,Na)(UO2)[HSiO4]·0.5H2O
Strunz: 
9.AK.15
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Pick's Delta Mine (Delta Mine; Pick's Mine), Delta, San Rafael District (San Rafael Swell), Emery Co., Utah, USA...

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.