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Calcite & Amethyst

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MGR1081428

Description Tabs

Description
Locality: 
Iraí, Rio Grande do Sul, Brazil
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11.7 × 9.5 × 8.1 cm
Description

The locality produced thousands of white, milky Calcite crystals - so this one is really exceptional. The complete perfect sphere is 72mm across. It shows an ivory-like color. But there is some kind of crazy effect - the whole sphere is covered with completely optical, highly lustrous calcite crystals. I tried to show this effect - you can see the highly lustrous faces on rightbhand side on my photo. But the whole sphere is coverd with this transparent layer. Hard to show this with the camera, but in person it really looks fantastic. So this unique effect in union with perfect luster abd unusual spherical habit makes this piece really stand out the crowd. Very, very special for Irai and in excellent condition.

Mineral Data
What's on the rock

Calcite

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

Amethyst

Variety Of: 

Quartz

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