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Stilbite

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CR584060

Stilbite

Classic Locality

Description Tabs

Description
Locality: 
Strzegom, Strzegom-Sobótka Massif, Lower Silesian Voivodeship, Poland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5.5 × 2.5 cm
Description

Brown stilbite crystals very rich on feldspar matrix.

Very good old specimen.

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