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Prehnite Pumpellyite Julgoldite & Calcite

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ESM716437

Prehnite Pumpellyite Julgoldite & Calcite

Description Tabs

Description
Locality: 
Kreimbach-Kaulbach Quarry, Lauterecken-Wolfstein, Kusel, Rhineland-Palatinate, Germany
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
14 × 10 × 9 cm
Description

Botryoidal green prehnite crystals on black pumpellyite, green julgoldite micro-crystals and clear calcite crystals on matrix (sawn base)

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

Pumpellyite

Synonym Of: 

Pumpellyite-(Al)

Formula: 
Ca2(Al,Fe2+,Mg)Al2(Si2O7)(SiO4)(OH,O)2·H2O
Strunz: 
9.BG.20
Hardness: 
0.0

Pumpellyite-(Fe2+)

Formula: 
Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Hardness: 
0.0

Pumpellyite-(Fe3+)

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

Pumpellyite-(Mg)

Formula: 
Ca2MgAl2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Hardness: 
5.5

Pumpellyite-(Mn2+)

Formula: 
Ca2(Mn2+,Mg)(Al,Mn3+,Fe3+)2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Hardness: 
0.0
Group Parent: 
Pumpellyite Group

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White