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Sphalerite Bournonite & Calcite

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PCZ741447

Sphalerite Bournonite & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Boldut Mine, Cavnic, Maramureș County, Romania
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.6 × 5.2 × 3.7 cm
Description

A beautiful specimen of very well crystallised black reflective sphalerite crystals (up to 1.8cm across) with pinkish calcite. Between these are some excellent sharp cogwheels (one twinned) of bournonite (up to 3mm). Nice display.

Condition
General: 
Very good - Some very minor marks
Mineral Data
What's on the rock

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

Bournonite

Formula: 
PbCuSbS3
Strunz: 
2.GA.50
Hardness: 
2.5 - 3.0
Type Locality: 
Wheal Boys (Trewetha Mine; Old Trewetha Mine), Port Isaac, St Endellion, Wadebridge District, Cornwall, England, UK

Calcite

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