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Millerite On Calcite & Steatite

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TBM785060

Millerite On Calcite & Steatite

Description Tabs

Description
Locality: 
Botro del Diavolo, Livorno, Livorno Province, Tuscany, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
4.4 × 5.4 × 11.1 cm
Weight: 
326.00gr
Description

This millerite specimen has been found, embedded into a calcite vein, in a old steatite quarry on the west side of Botro del Diavolo. The calcite has been removed with cold dilute HCl.

Mineral Data
What's on the rock

Millerite

Formula: 
NiS
Strunz: 
2.CC.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 3.5
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Calcite

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

Steatite

Variety Of: 

Talc

Formula: 
Mg3(Si4O10)(OH)2
Strunz: 
9.EC.05
Hardness: 
1.0
Formula: 
Mg3(Si4O10)(OH)2
Hardness: 
0.0