The name Cryolite is taken from the Greek for ice stone, due to a combination of its white, icy appearance, and the fact that it has a refractive index only 0.01 different to that of water. This means that when placed in water, Cryolite becomes virtually invisible, almost as though it has melted like ice in water.
White, Brown, Black
Vitreous, Greasy, Pearly
Greenland, Spain, Denmark, USA
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