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Topaz & Opal Var Hyalite

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SLN203485

Topaz & Opal Var Hyalite

Description Tabs

Description
Locality: 
Villa García Municipality, Zacatecas, Mexico
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.2 × 3.6 × 3.2 cm
Description

Nice specimen with several topaz crystals of a beautiful red-brown in graduated shading associated with opal var hyalite of a transparent white color

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

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

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