


This specially designed high quality testing ultra white test stone can be washed and used again for hundreds of tests. It is designed specifically for testing and leaves a very visible streak when testing gold, silver, and platinum. It will not damage the pieces you are testing.
This stone has a rubber backing and is brand new in the original PuriTEST Box! In comparison to the black 2x2 stone, the ultra white PuriTEST stone has increased color change visibility!