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Genthelvite Löllingite & Dolomite On Quartz

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PMN742948

Genthelvite Löllingite & Dolomite On Quartz

Description Tabs

Description
Locality: 
Huanggang Mine, Hexigten Banner, Chifeng City, Inner Mongolia, China (Peoples Republic)
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
4 × 7 × 5 cm
Largest Crystal: 
2.00cm
Weight: 
230.00gr
Description

This piece presents a few coveted minerals that made the deposit famous, a large (for the species) spray of genthelvite (23 mm) and a well formed shell shaped löllingite (there is more of this mineral, as well as magnetite in the matrix). The quartz crystals are of the stacked habit and coloured pastel green due to hedenbergite present.Creamy dolimite adds more contrast. This is a complex, undamaged cluster that presents well without support. If you'd like to see a video, please ask

Mineral Data
What's on the rock

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

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

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White