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Metacinnabar Dolomite & Gypsum

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CLB93718

Metacinnabar Dolomite & Gypsum

Rare Mineral

Description Tabs

Description
Locality: 
Siele Mine, Piancastagnaio, Siena Province, Tuscany, Italy
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.7 × 5.6 × 3.8 cm
Description

Very rare red metacinnabar between dolomite rosettes on a thin layer of gypsum (or calcite?).

Mineral Data
What's on the rock

Metacinnabar

Formula: 
HgS
Strunz: 
2.CB.05a
Hardness: 
3.0
Type Locality: 
Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USA

Dolomite

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

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.

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