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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“Let us then approach the throne of grace with confidence, so that we may receive mercy and find grace to help us in our time of need.”
– Hebrews 4:16