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Genthelvite On Quartz & Manganoan Calcite

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PMN763973

Genthelvite On Quartz & Manganoan Calcite

Description Tabs

Description
Locality: 
Huanggang Mine, Hexigten Banner, Chifeng City, Inner Mongolia, China (Peoples Republic)
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 4 × 2.5 cm
Largest Crystal: 
0.50cm
Weight: 
33.00gr
Description

Well formed cluster of genthelvite sits on the typical green quartz from Huanggang and is associated with a group of sharp, fluorecent calcite crystals. Again it seem to have been a one-off thing to see this beryllium silicate appear in inner mongolia. The reports say that many of these are mixes with danalite - this piece was not tested but given the nature of the deposit it would not be surprise to see Fe present.

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

Quartz

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

Manganoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Mn)CO3
Hardness: 
0.0