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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“For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do.”
– Ephesians 2:10