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Thomsonite-Ca & Stilbite

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ZLT101851

Thomsonite-Ca & Stilbite

Description Tabs

Description
Locality: 
Gotueidi, Eysturoy Island, Faroe Islands, Denmark
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.5 × 3.5 cm
Description

Balls of thomsonite-Ca on small stilbite. Some green seladonite.

Mineral Data
What's on the rock

Thomsonite-Ca

Formula: 
NaCa2[Al5Si5O20]·6H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Old Kilpatrick, Strathclyde (Dunbartonshire), Scotland, UK

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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