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Jennite With Bultfonteinite & Poldervaartite

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AMM986755

Jennite With Bultfonteinite & Poldervaartite

Classic Locality

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.6 × 1.4 cm
Description

Excellent specimen with white bultfonteinite bundles in association with one cream coloured blocky poldervaartite crystal. In addiation, there are lots of small white to colourless jennite crystals of the bultfonteinite needles. Richly set from the front and back.

Bulfonteinite is only known from a few localities worldwide. Optical very esthetic.

Short information: This is the first of three auctions in July before a summer break. 

Mineral Data
What's on the rock

Jennite

Formula: 
Ca9(Si3O9)2(OH)8·8H2O
Strunz: 
9.DG.20
Hardness: 
3.5
Colour: 
White
Type Locality: 
Crestmore quarries, Crestmore, Riverside Co., California, USA

Bultfonteinite

Formula: 
Ca2(HSiO4)F·H2O
Strunz: 
9.AG.80
Hardness: 
4.5
Streak: 
white
Type Locality: 
Bultfontein, Lejweleputswa District, Free State Province, South Africa

Poldervaartite

Formula: 
CaCa[SiO3(OH)](OH)
Strunz: 
9.AF.90
Crystal System: 
Orthorhombic
Hardness: 
5.0
Streak: 
white
Type Locality: 
Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese field, Northern Cape Province, South Africa...

Seller Information

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Money back guarantee is valid until 14 days after receiving the payment. The refund will be initiated immediately upon receiving the minerals back. Due to the return time, there may be a delay in the refund.