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Rutile Quartz & Calcite

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SER861898

Rutile Quartz & Calcite

Description Tabs

Description
Locality: 
Griesferner Glacier, Oberbergtal, San Giacomo, South Tirol, Trentino-Alto Adige, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 2.2 × 1.2 cm
Description

a group of quartz crystals host some calcite crystals and hundreds needle of rutile

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

Quartz

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White