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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“Let us strengthen and cheer ourselves with the persuasion that nothing can befall us by chance, that all our times are in his hand, and that we are immortal till our work is done.”
–Works of Rev. William Jay, Evening, Sept. 12