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Guérinite Whitecapsite & Pharmacolite

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BCK714836

Guérinite Whitecapsite & Pharmacolite

Martin Jensen collection
Type Locality

Description Tabs

Description
Locality: 
White Caps Mine, Manhattan, Nye County, Nevada, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 2.7 × 1.6 cm
Description

You are bidding on a very rich thumbnail from the Martin Jensen collection with a wild paragenesis! This find produced what may be the largest single crystals of guerinite and they are present here as colorless plates on and intergrown with abundant radial sprays of pharmacolite on realgar/stibnite matrix. There are also a few tiny, orange prisms of whitecapsite present as well as small crystals of native sulfur. Very interesting assemblage! Martin collected this sample on July 31, 2010. 

Mineral Data
What's on the rock

Guérinite

Formula: 
Ca5(AsO4)2(HAsO4)2·9H2O
Strunz: 
8.CJ.75
Crystal System: 
Monoclinic
Hardness: 
1.5
Colour: 
Colorless
Streak: 
White
Type Locality: 
Daniel Mine (St. Daniel Mine), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Whitecapsite

Formula: 
H16Fe2+5Fe3+14Sb3+6(AsO4)18O16·120H2O
Hardness: 
2.0 - 2.5
Streak: 
yellowish
Type Locality: 
White Caps Mine, Manhattan, Manhattan District, Toquima Range, Nye Co., Nevada, USA

Pharmacolite

Formula: 
Ca(HAsO4)·2H2O
Strunz: 
8.CJ.50
Crystal System: 
Monoclinic
Hardness: 
2.0 - 2.5
Streak: 
White
Type Locality: 
Sophia Mine, Böckelsbach valley, Wittichen, Schenkenzell, Black Forest, Baden-Württemberg, Germany

Seller Information

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