Jewelry Testing Kit 10K, 14K, 18K,22K, Silver & Platinum with Scratch Stone & Wooden Storage Box - Accurately test and verify gold, Silver & Platinum authenticity with this professional kit. Includes 10K, 14K, 18K 22K Silver & Platinum testing solutions a 2" x 1.5" scratch stone, wooden storage box with 7 compartments, and instructions. Ideal for appraisals, jewelry testing, scrap evaluation, and precious metal authentication. Compact box size: 5-7/8" x 3-1/4" x 4-1/4"Simple to use-scratch the metal, apply a drop of solution, and check if the mark remains to identify the correct karat.