GOLD TESTING KIT: Set of four needles from ToolTreaux includes 10k, 14k and 18k for gold purity and karat testing, as well as a 999S needle for silver
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Gold Test Needles-Set of Five-10K-14K-18K-22K & .999 Silver This set of test needles has three different gold karats and one silver fineness
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Scratch testing is one of the oldest and most reliable karat and purity tests available for testing precious metal quality and content, and is ideal when used in conjunction with testing stones and testing solutions. ToolTreauxs 5pc Silver and Gold Testing Kit includes 10k, 14k, 18k and 999S needles, conveniently held together for safekeeping on a brass key ring. How to Test (Gold): Scratch the metal in question onto testing stone.
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Scratch testing is one of the oldest and most reliable karat and purity tests available for testing precious metal quality and content, and is ideal
ToolTreaux 10k 14k 18k 999S Silver and Gold Testing Kit Needles with Jewelry Testing Stone, 6pc