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Stilbite & Epidote

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MGR747193

Stilbite & Epidote

Description Tabs

Description
Locality: 
Arrondissement Diakon, Cercle de Bafoulabé, Kayes Region, Mali
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 4.1 × 3.6 cm
Description

A complete sphere of intense yellow-orange stilbite, consisting of uncountable tiny faces set on a base of well developed epidote crystals. Rare and high valued material.

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...