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Gyrolite With Apophyllite

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PCZ153392

Gyrolite With Apophyllite

Description Tabs

Description
Locality: 
Maxwell Quarries, Ballymena, County Antrim, Northern Ireland, United Kingdom
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 5 × 2.5 cm
Description

Gyrolite balls up to 1.0 cm in diameter with translucent apophyllite up to 1.5cm across on basalt matrix. Down to my last few of these collected many years ago when collecting was permitted at the location. As with last month all specimens in this auction have a starting bid of just $3 regardless of size, TL etc. In addition all purchases over $6 will qualify for a free crystalline zeolite specimen (at least miniature size) of a different type than those purchased.

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

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
Peter Crozier Minerals