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Prehnite & Apophyllite

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SHW568841

Prehnite & Apophyllite

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Description
Locality: 
Malad Quarry, Mumbai, Maharashtra, India
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 4 × 3.5 cm
Weight: 
30.00gr
Description

Free standing specimen of ocean green Prehnite with tubular shape crystals of Apophyllite. Specimen far better in person than in photographs.

Mines producing top quality Okenite & Prehnite in Malad are already closed due to expansion of localities around. However some time specimens are found in that aread during excavation work for foundation of big buildings.

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

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

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