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Prehnite Stilbite & Pumpellyite-(Mg)

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CSW823271

Prehnite Stilbite & Pumpellyite-(Mg)

Collected by E. Stanchich
Classic Locality

Description Tabs

Description
Locality: 
Upper New Street Quarry, Paterson, Passaic County, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 2.1 × 2.1 cm
Weight: 
13.00gr
Description

A nice association of light green, spherical clusters of prehnite crystals associated with creamy white stilbite crystals and dark green micro pumpellyite-Mg crystals.

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

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

Pumpellyite-(Mg)

Formula: 
Ca2MgAl2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Crystal System: 
Monoclinic
Hardness: 
5.5
Streak: 
White
Type Locality: 
Keweenaw Co., Michigan, USA

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