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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“At the least whosoever has the spirit of Christ, shall find that spirit in him striving against that which is contrary, and by little and little gaining ground. Where there is no conflict, there is no spirit of Christ at all.”
–Richard Sibbes, Description of Christ