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Rutile Dolomite & Quartz

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MGR658478

Rutile Dolomite & Quartz

Description Tabs

Description
Locality: 
Mur Source, Murwinkel, Salzburg, Austria
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2 × 1.7 cm
Description

Alpine rutile is generally very rare, but from Lungau area it is really outstanding. The crystal shows dark red color and uncountable sharp and lustrous steps - and it is even end-pointed. The crystal is completely freestanding, it shows a very attractive contrast to light dolomite crystals. Finally you can see a small group of green quartz crystals (caused by chlorite inclusions) to the left hand side. A superb sample of alpine Rutile from a very rare locality !

Mineral Data
What's on the rock

Rutile

Formula: 
TiO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal - Ditetragonal Dipyramidal
Hardness: 
6.0 - 6.5
Type Locality: 
Rutile locality, Horcajuelo de la Sierra, Madrid, Spain

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White
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