Set of 4 Gold Test Needles this set of 4 gold test needles (10K,14K,18K and sterling). Used as a comparison standard when testing gold on a test stone. Needles and item to be tested are rubbed on test stones and treated with acid to determine match.
Set of 4 Gold Test Needles this set of 4 gold test needles (10K,14K,18K and sterling). Used as a comparison standard when testing gold on a test stone. Needles and item to be tested are rubbed on test stones and treated with acid to determine match.