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Cristobalite Tridymite

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ZLT1038825

Cristobalite Tridymite

Description Tabs

Description
Locality: 
Caspar Quarry, Bellerberg, Ettringen, Eifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.1 × 1.2 × 1 cm
Description

Fraction of a xenolith with a vog showing an octhederon fp cristobalite and some tabular tridymite. Collected 1998. FOV 1.7 mm.

Mineral Data
What's on the rock

Cristobalite

Formula: 
SiO2
Strunz: 
4.DA.15
Crystal System: 
Tetragonal - Trapezohedral
Hardness: 
6.0 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico

Tridymite

Formula: 
SiO2
Strunz: 
4.DA.10
Crystal System: 
Triclinic - Pedial
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico

Seller Information

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