How to Acid Test Platinum
Instructions
-
-
1
Run a sharp edge of the jewelry across the black stone. Apply enough pressure to create a 1-inch bright white line across the black stone.
-
2
Release one drop of the testing solution centered on the white line. Apply the drop at one end of the white line in order to perform subsequent tests without having to scratch another metal deposit.
-
-
3
Wait at least 3 minutes. Watch to see if the line disappears. If the line completely disappears, the metal you are working with is not platinum. In this case, the metal may be white gold less than 22-carat, nickel, palladium, silver or a mixture of metals. If the line changes colors, the metal in the jewelry may be an alloy and not completely pure.
-
1
