Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Jacobsite & Calcite

Views:
Watches:
RAF693941

Jacobsite & Calcite

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 4 × 3 cm
Largest Crystal: 
0.10cm
Weight: 
174.00gr
Description

A fine magnetic Jacobsite and Calcite specimen from N'Chwaning II, Northern Cape, South Africa

 

Mineral Data
What's on the rock

Jacobsite

Formula: 
Mn2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Type Locality: 
Jakobsberg Mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden

Calcite

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