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Amethyst Ankerite & Calcite

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CLB615439

Amethyst Ankerite & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Osilo, Sassari Province, Sardinia, Italy
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
14.5 × 10.5 × 5.5 cm
Weight: 
451.00gr
Description

Big Osilo amethyst specimen with (not-so-common) beige-orange ankerite crystals and some calcite. Nice double-terminated amethyst crystals and a reverse sceptre.

Only a few contact-damages.

Mineral Data
What's on the rock

Amethyst

Variety Of: 

Quartz

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

Ankerite

Formula: 
Ca(Fe2+,Mg)(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Styrian Erzberg, Eisenerz, Styria, Austria

Calcite

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

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