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Mineralpedia Details for Garronite

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Garronite

Garronite

Formula
NaCa2.5(Si10Al6)O32ยท13H2
Crystal System
Tetragonal 
Crystal Habit
Acicular, Massive - Fibrous, Radial 
Cleavage
Good, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, white 
Streak
white 
Class
Tetragonal - Dipyramidal 
Fracture
Uneven 
Hardness
4-5 
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Garronite from Garron Point, Co. Antrim, Northern Ireland

Garronite
            from Garron Point, Co. Antrim, Northern Ireland

Tightly packed radial crystals filling amygdules in basalt. Recognized as a new mineral in 1960 and named after Garron Plateau of Northern Ireland. A zeolite.

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