I present Crystallography as an intesting subject to study to those that have the time and energy.. I stumbbled on the subject a few years ago.. but am no Gemologist..
So interesting that ICE(drystals) have air in it thats why it does not form under water.. it floats.. The bottom of lakes(and ocean) are not frozen because of that(partly)..
Is GoD COOL OR WHAT?...
Of a truth, were it not for the crystalline geometry of frozen water, it would not float and the life beneath would not be insulated and would die.