For Testing Gold, Silver, Platinum using test acid.
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 in this size can cost $60 to $70. for a stone this size.
Advantages of the Pro-Premium Stones
Large 2 x 2 x 3/8 inch
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 and rinse with water .
Easy to follow instructions are included (test acid are not included )
Photos Shows 6 magnification of one strike mark of gold and silver on each stone.
This product was added to our catalog on Friday 21 August, 2009.