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Gyrolite Laumontite & Apophyllite

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SER722954

Gyrolite Laumontite & Apophyllite

Description Tabs

Description
Locality: 
Malad Quarry, Mumbai, Maharashtra, India
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4 × 2.6 cm
Description

a cluster of apophyllite crystals hosts some tufts of laumontite and several green balls of girolite

Mineral Data
What's on the rock

Gyrolite

Formula: 
NaCa16Si23AlO60(OH)8·14H2O
Strunz: 
9.EE.30
Hardness: 
2.5
Streak: 
White
Type Locality: 
The Storr, Portree, Trotternish, Isle of Skye, North West Highlands (Inverness-shire), Scotland, UK

Laumontite

Formula: 
CaAl2Si4O12·4H2O
Strunz: 
9.GB.10
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Huelgoat (Locmaria-Berrien), Finistère, Brittany, France

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