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Rock Crystal & Siderite

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MGR723976

Rock Crystal & Siderite

Floater

Description Tabs

Description
Locality: 
Schin Gorge, Thusis, Viamala Region, Grisons, Switzerland
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
13.4 × 11 × 5.7 cm
Description

The specimen is developed as floater consisting of uncountable smaller crystals with an exposed main group of larger crystals at the center. The crystals show a thin Limonite layer, the faces are all very glossy. Please note that the endpoint of the main crystal is not damaged, it only has not enough room to grow and so it developed tiny steps at one endpoint. Several dark brown Siderite crystals are scattered all over.

Mineral Data
What's on the rock

Rock Crystal

Variety Of: 

Quartz

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

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White