We covered a basic visual test and then the hearing test. If your stone passed both those tests, it is ready for another visual test.
Wet the stone with water. The entire stone. Some people just squirt the stone a little, but this really just gives you an idea of the color of the stone, not the quality. So, this is not dab a little water on part of the stone and see how pretty it looks...
With the stone wet, look for any dark lines--typically thin and fairly straight.
I'm not talking about color variation like veins in marble. Look for lines that seem to go through or around the stone. This usually means there is a crack in the stone, or a layer of different material that will probably cause your beautiful stone to break into two or more pieces.
Tomorrow we'll talk about testing stones for softness!
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