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Prehnite Julgoldite-(Fe2+) Fluorapophyllite-(K) & Natrolite

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CLB573583

Prehnite Julgoldite-(Fe2+) Fluorapophyllite-(K) & Natrolite

Classic Locality

Description Tabs

Description
Locality: 
Rauschermühle Quarry, Niederkirchen, Kaiserslautern, Rhineland-Palatinate, Germany
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.3 × 6 × 2 cm
Description

A very interesting specimen with glossy, green, botryoidal prehnite and tiny moss to dark green julgoldite-(fe2+) crystal aggregates. Details missed by the photographer: slightly etched fluorapophyllite-(k) and tiny natrolite crystals on the back of the specimen (some micro crystals n the front too).

Rare combination.

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

Julgoldite-(Fe2+)

Formula: 
Ca2(Fe2+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Crystal System: 
Monoclinic
Hardness: 
0.0
Type Locality: 
Långban, Filipstad, Värmland, Sweden

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Seller Information

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