Test gold, silver, and other precious metals with confidence using the GTE Complete Acid Scratch Test Stone Kit. Designed for jewelers, refiners, coin collectors, pawn shops, and hobbyists, this kit provides multiple stone sizes for a wide range of testing applications while protecting your valuable items during the testing process.
Simply make a small streak on the test stone, apply the appropriate testing acid (sold separately), and compare the reaction to determine the approximate karat or purity of your sample.
Kit Includes
GTE Black Test Stone – 3" × 6"
GTE Black Test Stone – 2" × 4"
GTE Black Test Stone – 2" × 2"
GTE White Test Stone – 2" × 2"
½ oz GTE Neutralizing Solution
Easy-to-follow instruction booklet with color comparison chart
Features
Premium quality genuine GTE testing stones
Durable rubber backing helps prevent slipping during testing
Suitable for testing gold, silver, jewelry, bullion, scrap, bars, coins, and other precious metal items
Reusable for hundreds of tests with proper care
Easy to clean between tests using the included neutralizing solution or a baking soda and water rinse
How to Use
Clean the item to be tested.
Rub the metal across the test stone to leave a visible streak.
Apply the appropriate testing acid to the streak.
Observe the reaction and compare it with the included reference guide.
Neutralize and clean the stone before the next test.
Built for Professionals & Hobbyists
Whether you're evaluating estate jewelry, buying scrap gold, verifying bullion, or identifying precious metals, GTE test stones provide a reliable surface for consistent acid testing.
Please Note
Testing acids are sold separately.
For best results, always use the appropriate GTE testing acids and follow all safety instructions provided with those products.
