Minerals / Analcime, Croft quarry.
Analcime, Na(AlSi2O6) . H20 is a tectosilicate and classed as a zeolite. The specimen is from Croft quarry in Leicestershire, which is a noted site for analcime.
The quarry is in igneous tonalite rocks of Ordovician age.
The few crystals on the base of the specimen are trapezohedral in form.
A To Z Of Minerals...
Back To Home...