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Topaz & Opal-AN

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PJM88566

Topaz & Opal-AN

Ex J & S Mommers Collection.

Description Tabs

Description
Locality: 
Villa Garcia, Zacatecas, Mexico
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.4 × 2.1 cm
Description

Two asethetic sprays of gemmy, bi-colored topaz crystals beautifully set in a concave shell of rhyolite  from Zacatecas, Mexico. Most crystals have very nice, red-brown terminations, the colour due to rutile inclusions. This is a double sided specimen, and it is difficult to select which side is better,, on divergent spray has a cluster of clear opal-AN and is recessed in the concave matrix, the second spray rises from the top or back of the thin concave matrix.

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

Opal-AN

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
Earthstones Australia

Seller Information

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