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Sainfeldite & Guérinite

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CR14875

Sainfeldite & Guérinite

Glassy pink clusters of the rare mineral sainfeldite with silky guerinite crystal groups on matrix. With minor picropharmacolite and pink erythrite sprays.

Rich specimen of both rare minerals

Description Tabs

Description
Locality: 
Bauhaus, Nentershausen, Hersfeld-Rotenburg, Kassel Region, Hesse, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 5.4 × 3 cm
Description

Glassy pink clusters of the rare mineral sainfeldite with silky guerinite crystal groups on matrix. With minor picropharmacolite and pink erythrite sprays.

Rich specimen of both rare minerals

Mineral Data
What's on the rock

Sainfeldite

Formula: 
CaCa2Ca2(AsO4)2(HAsO4)2·4H2O
Strunz: 
8.CB.10
Crystal System: 
Monoclinic
Hardness: 
4.0
Streak: 
White
Type Locality: 
Gabe Gottes Mine (incl. Giftgrube), Neuenberg, Ste Marie-aux-Mines (Markirch), Haut-Rhin, Alsace, France

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