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Topaz With Smoky Quartz Feldspar & Mica

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PCZ724757

Topaz With Smoky Quartz Feldspar & Mica

Description Tabs

Description
Locality: 
Diamond Rocks, Mourne Mountains, County Down, Northern Ireland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10.5 × 7 × 6 cm
Description

A sizable and quite heavy specimen of pegmatite containing cavities two of which contain colourless topaz crystals. There are also sharp smoky quartz and feldspar crystals along with nice hexagonal books of mica.  Uncommonly offered material nowdays.

 

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

Smoky Quartz

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
SiO2
Hardness: 
0.0

Feldspar

Group Parent: 
Feldspar Group

Mica

Group Parent: 
Mica Group
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