Turquoise. A hydrous phosphate or alumina containing a little copper. It has a blue, or bluish-green color, and usually occurs in kidney-shaped masses with a nodular surface, like that of a bunch of grapes. The fine specimens are worth nearly half as much as diamonds.

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“Two things are necessary to the life of pure faith. The first is, that we behold God alone, under all the imperfect coverings that conceal him; the second is, constantly to have our souls kept in a state of dependence.”
–Fenelon