Gold Test Needles-Set Of Five-8K-10K-12K-14K & 18K Ring Mountings 5 mm Approximate Stone Weight

5 mm Approximate Stone Weight 3/8 ct (diamond weight) Prong Count 4 Construction Die struck Finish Highly polished Ring Size Range 6–6-1/4 (standard USA) 14K White Gold Alloy Nickel-based

569) Number of Screwdrivers 9 Blade Sizes 0

Ready for stone setting and sizing straight from the package

199 Roll Position Upper roll only Compatible Metals Copper

more precise results

Gold Test Needles-Set Of Five-8K-10K-12K-14K & 18K Ring Mountings 5 mm Approximate Stone WeightGold test needles are an essential tool for jewelers and precious metal buyers who need to verify the karat purity of gold items using acid testing. This set includes five needles spanning the most commonly encountered gold karats 8K, 10K, 12K, 14K, and 18K giving you a comprehensive reference range for comparative acid testing. To use, select the appropriate karat needle and rub or scratch it against a test stone. Make a second mark on the stone with