Fluorite. Calcium fluoride, a mineral of many different colors, white, yellow, purple, red, etc., often very beautiful. When crystallized it is commonly in cubes with perfect octahedral cleavage. Some varieties are used for ornamental vessels. Also called fluorspar, or simply fluor. The colored varieties are often called false ruby, false emerald, false topaz, false sapphire, and false amethyst. For jewelry purposes the chief value of the stone is the expense of cutting and mounting.

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“By this all men will know that you are my disciples, if you love one another.”
– Jesus, John 13:35