Medium Touchstone for Precious Metal Test Kits

Item # IT018412
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Retail $15.00 Our Price $10.99
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This listing is for a Medium Touchstone for Testing Precious Metals. This test stone measures 2" x 1-5/8" x 1/4". Each order is for one test stone, test solutions must be purchased separately. This item is new from our inventory.

A touchstone, also refered to as a test stone, is a small, abrasive, silicone based stone that is impervious to acid and easy to clean. When a metal is rubbed on a touchstone, a small amount of the metal is deposited on the stone, forming a colored stripe. This is usually compared to a strip ground from a known metal. A drop of testing solution is then applied to the stripes. By observing the reaction between the acid and the metal stripes, the purity of the metal can be determined.
Medium Touchstone for Precious Metal Test Kits
Only 1 left!
Quantity:  add to cart
send to wishlist
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