This premium quality Gold test stone is used for determine the carat content of jewelry. The object to be tested is scratched on the surface of the stone and a test acid solution determines the karat of the scratch....
This large stone is used for silver and gold testing that is dark and shows results clearly. Use this stone when you need a new high quality surface for your testing chemicals...
GOLD TESTING STONE BLACK Description :-This wooden mandrel provide snug fit for emery ring shells. Moreover it has pre drilled centre hole for use on bench polisher....
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