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Stilbite-Ca & Thomsonite-Ca

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ZLT529430

Stilbite-Ca & Thomsonite-Ca

Description Tabs

Description
Locality: 
Lítlafelli, Eysturoy Island, Faroe Islands, Denmark
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 2 × 1.5 cm
Largest Crystal: 
1.00cm
Description

Cluster of tabular stilbite crystals with small spheres og thomsonite-Ca. From tunnel works in 1976.

Mineral Data
What's on the rock

Stilbite-Ca

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

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

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