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Stilbite & Epidote

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MGR715705

Stilbite & Epidote

Description Tabs

Description
Locality: 
Arrondissement Diakon, Cercle de Bafoulabé, Kayes Region, Mali
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.7 × 7 × 5.7 cm
Description

A huge sphere (57mm across) of orange-yellow glossy stilbite on dark green sharp terminated, glossy epidote crystals. The sphere consits of tiny lustrous faces. The assemble is spectacular and could not be more aesthetic, the dimension of the sphere is really remarkable and the contrast is amazing, too. This material is very uncommon and hard to obtain in this size and quality.

Mineral Data
What's on the rock

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White

Epidote

Formula: 
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05a
Crystal System: 
Monoclinic
Hardness: 
6.0
Streak: 
Colorless
Type Locality: 
Bourg d'Oisans, Isère, Rhône-Alpes, France...