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Five angel heads in ivory are placed like a crown on the inside of the back of the throne; their wings are studded with multi-colored gems and with antique fluorspar; the back of the throne is laid with blue Hungarian opals."
Under a gnarled old olive, by the river's brim, Annunziata sat on the turf, head bowed, so that her curls fell in a tangle all about her cheeks, and gazed fixedly into the green waters, the laughing, dancing, purling waters, green, and, where the sun reached them, shot with seams and cleavages of light, like fluorspar.
By 1908 America alone produced over 9,000 tons valued at over $500,000,000, while European manufacturers were also large producers. In 1888 the electrolytic manufacture of aluminum was commenced in America and in the following year it was begun in Switzerland. Aluminum is formed by the electrolysis of the aluminum oxide in a fused bath of cryolite and fluorspar.
It is obtained from decomposition of fluorspar by strong sulphuric acid. It readily dissolves the silica in glass, and consequently cannot be kept in a vessel of that material. It is prepared and kept in lead. It is employed in accelerators on account of its fluorine. One small drop on the tongue of a dog causes death.
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