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Hemimorphite On Fluorapatite Psm Tarbuttite On Chalcedony

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KMF620135

Hemimorphite On Fluorapatite Psm Tarbuttite On Chalcedony

Fluorescent

Description Tabs

Description
Locality: 
Skorpion Mine, Rosh Pinah, Oranjemund, Karas Region, Namibia
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
13 × 11 × 4.5 cm
Description

In terms of size and condition this is an exceptional piece from the Skorpion mine, presenting a certain aesthetics that is generally amiss from the typical plate style specimen that come from the locality. 

The color contrast is striking featuring pastel green fluorapatite against white botryoidal chalcedony with good isolation of the mineralized zones spread out across the 13cm matrix one of which extends out over to the back surface exposing the minerals nicely for better viewing. The fluorapatite psm are exceptionally good having retained the sharp form of the former tarbuttite crystals exhibiting simple radiant fan like structures and highly complex aggregates and bowtie twins also.

Minor colorless hemimorphite crystals are easily discernible as a later development positioned on the surface of the psm.

The condition is outstanding with only peripheral contacting to the edges.

 

Mineral Data
What's on the rock

Hemimorphite

Formula: 
Zn4Si2O7(OH)2·H2O
Strunz: 
9.BD.10
Hardness: 
4.5 - 5.0
Streak: 
White
Type Locality: 
Băiţa Mining District (Baita Bihor; Rézbánya), Nucet, Bihor Co., Romania

Fluorapatite

Formula: 
Ca2Ca3(PO4)3F
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
5.0
Streak: 
White
Type Locality: 
Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany

Tarbuttite

Formula: 
Zn2(PO4)(OH)
Strunz: 
8.BB.35
Crystal System: 
Triclinic
Hardness: 
3.5
Streak: 
White
Type Locality: 
Kabwe Mine (Broken Hill Mine), Kabwe (Broken Hill), Kabwe District, Central Province, Zambia

Chalcedony

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey

Seller Information

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Seller's terms and conditions

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