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Löllingite Calcite & Genthelvite

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FRN128085

Löllingite Calcite & Genthelvite

Description Tabs

Description
Locality: 
Huanggang Mine, Hexigten Banner, Chifeng City, Inner Mongolia, China (Peoples Republic)
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 6.3 × 4 cm
Description

Lollingite (FeAs2), a mineral that related to arsenopyrite, (the sulphur from arsenopyrite (FeAsS) was replaced by arsenic) and the lollingite from this mine are being hailed as best of its kinds from its spear shape, lustrous and silvery crystals. The specimen is combined with cluster of cream white, thin-bladed hexagonal calcite and group of very sharp tetrahedral crystals of genthelvite with well-defined faces and edges set on the specimen.

Mineral Data
What's on the rock

Löllingite

Formula: 
FeAs2
Strunz: 
2.EB.15a
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 5.5
Type Locality: 
Wolfbau Mine, Lölling District, Hüttenberger Erzberg, Hüttenberg, Friesach - Hüttenberg area, Carinthia, Austria

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Genthelvite

Formula: 
Zn4(Be3Si3O12)S
Strunz: 
9.FB.10
Hardness: 
6.0 - 6.5
Type Locality: 
West Cheyenne Canon, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA
Oriental Minerals