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Julgoldite & Prehnite

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CLB176541

Julgoldite & Prehnite

ex collection E. Müller-Kaltenbach
Classic Locality

Description Tabs

Description
Locality: 
Rauschermühle Quarry, Niederkirchen, Kaiserslautern, Rhineland-Palatinate, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.8 × 1.9 cm
Description

Greenish black julgoldite-(fe2+) with botryoidal prehnite in two colors - pale blue and pale green..

Mineral Data
What's on the rock

Julgoldite

Synonym Of: 

Julgoldite-(Fe2+)

Formula: 
Ca2(Fe2+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Hardness: 
0.0

Julgoldite-(Fe3+)

Formula: 
Ca2(Fe3+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH,O)2·H2O
Strunz: 
9.BG.20
Hardness: 
4.5

Julgoldite-(Mg)

Formula: 
Ca2(Mg,Fe2+)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Hardness: 
0.0
Group Parent: 
Pumpellyite Group

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

Seller Information

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