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Apophyllite & Prehnite

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ATM1092710

Apophyllite & Prehnite

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Description
Locality: 
Zoetwater, Calvinia, Namakwa District, Northern Cape Province, South Africa
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
3.44 × 5.4 × 3.18 cm
Description

Superb stunning Zeolite from Northern Cape obscure locality.  Centred in Prehnite vug is a pale Green ball of Prehnite blades which is partially covered in prismatic Apophyllite cubes with bevelled corners.

Apophyllite not listed from this locality.

Prehnite ball 2.13cm

Apophyllite to 0.22cm

Ex my personal collection   L 2455

Mineral Data
What's on the rock

Apophyllite

Synonym Of: 

Fluorapophyllite-(K)

Formula: 
KCa4(Si8O20)(F,OH)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.5 - 5.0

Fluorapophyllite-(Na)

Formula: 
NaCa4(Si8O20)F·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0

Hydroxyapophyllite-(K)

Formula: 
KCa4(Si8O20)(OH,F)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0

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

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