Gold Testing Kit 10k 14k 18k Solution Acids Scratch Stone Test Gold Authenticity. 10K + 14K + 18K Testing Acids + Scratch Stone. 1 Bottle 10K. 3 x 0.5 Ounce Bottle contains enough acid for hundreds of tests and Black Scratch Stone.
Neodymium magnets are a composition of mostly Neodymium, Iron and Boron. To protect the magnet from corrosion and to strengthen the brittle magnet material, it is usually preferable for the magnet to be coated.
ERAFINE Jewelry Gold Silver Testing Kit, Gold Silver Tester Kit with Test Stone, Instructions 5ml Bottles. 10k/14k/18k Gold Test and Silver Test Acid Solutions Tester Kit. 2×2″ Premium Test Stone. 5ml 10k Gold Testing Solution.