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.
“I have told you these things, so that in me you may have peace. In this world you will have trouble. But take heart! I have overcome the world.”
– Jesus, John 16:33