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Villiaumite With Aegirine & Natrolite & Ellingsenite

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LGM652532

Villiaumite With Aegirine & Natrolite & Ellingsenite

Ex Dr. Krantz, Bonn, Germany
With Antique Label

Description Tabs

Description
Locality: 
Aris Quarry, Windhoek Rural, Khomas Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 5.5 × 3 cm
Largest Crystal: 
1.40cm
Weight: 
100.00gr
Description

A bright orange-red, transparent villiaumite crystal in a little geode from famous Aris Phonolite quarries; some of world best villiaumite crystals have been found here. This specimen features a quite big villiaumite crystal of 1.4 cm size, glowing like lava when lit. It is fully crystallized inside the geode but a little bit tucked away - one can only see the backside. Maybe something for trimming experts.

Accompanied by black needles of aegirine, blocky white natrolite and white tufts of ellingsenite (Aris is the type locality, see pics 9 & 10)

Nice contrast to the grey matrix, good villiaumites are increasingly hard to get. The backside and edges are sawn.

Mineral Data
What's on the rock

Villiaumite

Formula: 
NaF
Strunz: 
3.AA.20
Crystal System: 
Isometric
Hardness: 
2.0 - 2.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea

Aegirine

Formula: 
NaFe3+Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.25
Crystal System: 
Monoclinic
Hardness: 
6.0
Type Locality: 
Rundemyr, Øvre Eiker, Buskerud, Norway

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Ellingsenite

Formula: 
Na5Ca6Si18O38(OH)13·6H2O
Hardness: 
4.0 - 0.0
Streak: 
White
Type Locality: 
Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek District, Khomas Region, Namibia

Seller Information

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Thank you for viewing my auctions! Maintaining high standards in customer service is extremely important to me. If shipping takes longer than expected, please contact me. It is possible to file an investigation request, and during nearly ten years of e-rocks NO parcel was finally lost.

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