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Quartz

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HPM810022

Quartz

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Description
Locality: 
Giuv Valley, Tujetsch, Surselva Region, Grisons, Switzerland
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
12 × 12.5 × 7 cm
Description

This is an absolute rarity, the specimen consists of two smoky Quartz gwindels, oriented in an angle of 90 degrees.
The two gwindel are grown together, sometime they are parted and the fracture surfaces are both healed.
They are not glued together, although the fracture surfaces are matching without space.
The base gwindel consists of two intergrown gwindels, partly covered with chlorite, inside waterclear.
The top gwindel is also partly chlorite-covered, but inside also waterclear and with more excellent luster.
Please note the size of the specimen.

Mineral Data
What's on the rock

Quartz

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

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