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Pseudobrookite Porricin & Tridymite

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CLB101729

Pseudobrookite Porricin & Tridymite

Classic Locality

Description Tabs

Description
Locality: 
Bellerberg, Ettringen, Eifel Mountains, Rhineland-Palatinate, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.8 × 3.9 × 2 cm
Description

Hundreds of dark brown to black pseudobrookite crystals with lighter brown acicular porricine (an aegirine-augite variety) and white tridymite. A very rich specimen.

Mineral Data
What's on the rock

Pseudobrookite

Formula: 
Fe2TiO5
Strunz: 
4.CB.15
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
6.0
Streak: 
Brown
Type Locality: 
Uroi Hill (Arany Hill), Simeria, Hunedoara Co., Romania

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

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