Silver Testing Kit Silver Acid Test Liquid with Stone
Every Buyer will receive a one(1) NEW Half-Ounce (1/2 oz; 0.5 ounce) bottle of silver test acid along with a testing stone! (Exactly as shown in the picture)The acid will change color based on Purity of the sample you test.• 90% - 100% = DARK RED• 80% -  90% = LIGHT RED or brownish • 65% - 75% = Light Green ColorThe Acid Test--Step 1-Rub the coin on the testing stone. After doing this it will leave a silver streak on the stone. Then place one drop of the Silver Acid onto the streak on the stone.  (Reference the table above for purity levels).  Step 2-Clean the oxidized silver. Silvercoins.org recommends using a lemon acid bath or a silver cleaning solution.