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Stilbite

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ZLT121252

Stilbite

Description Tabs

Description
Locality: 
Hafrafell, Skaftafell, Hornafjörður, Eastern Region, Iceland
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 2.9 × 2 cm
Largest Crystal: 
1.70cm
Description

Stilbite crystal nice resting on a small piece a quartz shellwith some little heulandite crystals.. Collected 1974 from a temporary quarry at Hafrafell, today within the borders of the National park and a parking place for glacier trips.

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

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