出典:Wiktionary
fluorite (countable かつ uncountable, 複数形 fluorites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/17 20:52 UTC 版)
Fluorite (also called fluorspar) is a halide mineral composed of calcium fluoride, CaF2. It is an isometric mineral with a cubic habit, though octahedral and more complex isometric forms are not uncommon. Crystal twinning is common and adds complexity to the observed crystal habits.