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Julgoldite-(Fe3+) & Stilbite

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TPX690913

Julgoldite-(Fe3+) & Stilbite

Type Locality

Description Tabs

Description
Locality: 
Jalgoan Quarries, Maharashtra, India
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.6 × 3.6 × 2.3 cm
Weight: 
17.00gr
Description

Spectacular and very aesthetic group of rare julgoldite crystals on stilbite and chalcedony matrix. This beauty really looks like a sculpture, spectacular.

Mineral Data
What's on the rock

Julgoldite-(Fe3+)

Formula: 
Ca2(Fe3+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH,O)2·H2O
Strunz: 
9.BG.20
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Långban, Filipstad, Värmland, Sweden

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
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