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Prehnite Psm Glauberite

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PDM599162

Prehnite Psm Glauberite

Pseudomorph

Description Tabs

Description
Locality: 
Paterson, Passaic County, New Jersey, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 3.6 × 3.2 cm
Description

Representative hollow cast specimen of green prehnite pseudomorphs (epimorphs) after glauberite crystals up to 40 mm long.

Ex. A. Gelders specimen, #172.

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

Glauberite

Formula: 
Na2Ca(SO4)2
Strunz: 
7.AD.25
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
El Castellar Mine, Villarrubia de Santiago, Ocaña, Toledo, Castile-La Mancha, Spain

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