For Testing Gold, Silver, Platinum using test acid (acid not included).
The Pro-Premium stone, in the suppliers opinion, is equal if not superior to Arkansas and Natural River Danube Test Stones. Arkansas and Natural River Danube test Stones cost $18 to $40 for one 4 x 4 stone.
Advantages of the Pro-Premium Stones
This stone has a soft rubber backing that grips and protects the work surface.
Black in color for great contrast.
Extremely fine finish.
With a little practice a test can be made with one light strike leaving no scratch marks on the item being tested. A big advantage when testing non scrap items.
Easy To Clean - Clean with a drop of 22K acid (not included) and rinse with water.
Photos Shows 6 magnification of one strike mark of gold and silver on each stone.
This product was added to our catalog on Tuesday 05 May, 2009.