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Apophyllite Gyrolite & Analcime

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PCZ115992

Apophyllite Gyrolite & Analcime

Description Tabs

Description
Locality: 
Maxwell Quarries, Ballymena, County Antrim, Northern Ireland, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 6 × 5 cm
Largest Crystal: 
1.50cm
Description

A lovely specimen showing the association of these three minerals. The apophyllite at the top consists of a number of inter-grown crystals up to 1.5cm on an edge. The white and translucent gyrolite balls are up to 0.8cm across and the analcime takes the unusual (for the locality) form of balls of numerous small translucent crystals.

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

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

Analcime

Formula: 
Na2(Al2Si4O12)·2H2O
Strunz: 
9.GB.05
Crystal System: 
Triclinic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Cyclopean Islands, Acitrezza (Aci Trezza), Etna Volcanic Complex, Catania Province, Sicily, Italy
Peter Crozier Minerals