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Topaz & Hyalite On Fluorite On Foitite

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KMF653955

Topaz & Hyalite On Fluorite On Foitite

Classic Locality

Description Tabs

Description
Locality: 
Bergsig Farm 167, Omaruru, Erongo Region, Namibia
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 5 × 3.7 cm
Description

An unusual specimen from the Hohenstein discovery, this combination was never documented in the Mineralienwelt report, the three dimensional piece consists of a foitite crystal as matrix hosting a number of unique fluorite crystals that almost completely coat the underlying tourmaline.

Presenting typical purple accenting to what are otherwise water clear fluorite crystals with fine black tourmaline inclusions and coated with many small colorless topaz crystals and a thick layer of hyalite opal that glows under uv light exposure.

The condition I near perfect with some slight wear to the complex foitite termination.

Mineral Data
What's on the rock

Topaz

Formula: 
Al2(SiO4)(F,OH)2
Strunz: 
9.AF.35
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
8.0
Streak: 
White

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Foitite

Formula: 
(□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH
Strunz: 
9.CK.05
Crystal System: 
Trigonal
Hardness: 
7.0
Type Locality: 
California, USA

Seller Information

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