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Selenite On Siderite With Calcite

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PCZ687277

Selenite On Siderite With Calcite

ex. Mrs Monica Ungur collection.

Description Tabs

Description
Locality: 
Cavnic Mine, Maramureș County, Romania
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
15 × 12 × 3 cm
Description

A super specimen with sharp selenite crystals up to 1.4 cm in length and many doubly terminated. the matix is siderite crystals and there are numerous dodecahedral crystals of an unknown mineral coated with calcite. 

The specimen was acquired via Mrs Monica Ungur' a Romanian collector. Previously it was in the collection of Dicu Nicolaie, general  Director of the mines around Baia Sprie which must say something about it's quality and untypical appearance for the locality. 

Mineral Data
What's on the rock

Selenite

Variety Of: 

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Hardness: 
0.0

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Calcite

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