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Topaz & Sanidine

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ZLT194598

Topaz & Sanidine

Description Tabs

Description
Locality: 
Emmelberg, Üdersdorf, Daun, Eifel, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.5 × 3.5 × 2.5 cm
Description

Xenolith with voids, showing 2 fine bundles of acicular topaz crystals on micro sanidine crystals. Older specimen from ~1990.

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

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic - Prismatic
Hardness: 
6.0
Streak: 
White
Type Locality: 
Drachenfels, Königswinter, Siebengebirge, North Rhine-Westphalia, Germany

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