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Prehnite On Laumontite

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CLB608982

Prehnite On Laumontite

Classic Locality

Description Tabs

Description
Locality: 
Bärenstein Quarry, Radau Valley, Goslar, Lower Saxony, Germany
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 6.5 × 3.3 cm
Description

Pale green, botryoidal prehnite crystal spheres on laumontite or natrolite (in lack of comperative material I must guess). Very good quality. The material must be very rare. You don't see it anywhere else and the usual finds at the locality are more or less micromounts.

Better color-contrast in nature.

Mineral Data
What's on the rock

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

Laumontite

Formula: 
CaAl2Si4O12·4H2O
Strunz: 
9.GB.10
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Huelgoat (Locmaria-Berrien), Finistère, Brittany, France

Seller Information

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