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Datolite On Prehnite

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PDM633942

Datolite On Prehnite

Description Tabs

Description
Locality: 
East Granby, Hartford County, Connecticut, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4.4 × 2.5 cm
Description

Lustrous and gemmy datolite crystals with a light yellow colour on green prehnite masses.

Ex. Bob Janssens specimen #2148. Acquired in 1999 from Gilbert Gauthier (BE).

Mineral Data
What's on the rock

Datolite

Formula: 
Ca(HBSiO5)
Strunz: 
9.AJ.20
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Nødebro Mine (Nøddebro), Arendal Iron Mines, Arendal, Aust-Agder, Norway

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa

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