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Topaz With Herderite

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BNG541746

Topaz With Herderite

Description Tabs

Description
Locality: 
Shigar District, Gilgit-Baltistan, Pakistan
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 4.3 × 4 cm
Description

Beautiful specimen of topaz with herderite & feldsper the herderite crystals hosted on topaz.

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

Herderite

Formula: 
CaBePO4(F,OH)
Strunz: 
8.BA.10
Crystal System: 
Monoclinic
Hardness: 
5.0 - 5.5
Type Locality: 
Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany

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