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Prehnite

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CR628109

Prehnite

Classic Locality

Description Tabs

Description
Locality: 
Paterson, Passaic County, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 5 × 1.8 cm
Description

The Prehnites from the famous traprock quarries of New Jersey remain American classics.

This is a cluster of stalactitic Prehnite crystals, all conjoined, creating a fine, highly lustrous specimen with good color. These formed as the prehnite cast over a spray of anhydrite in the distant past.

Overall, the quality and aesthetics of this American classic are hard to beat.

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