- Special Function: Gold Testing Kit is used to verify the gold content in items, suitable for testing anything is 10K, 14K, 18K, 22- and gold. - Testing Method: jewelry gold tester, drop a drop of test on the stone, real gold will stay on the stone, fake gold will dissolve or oxidize to blue. - Easy to Use: jewelry tester appraisal kit, changes color according to , very easy to use. - Wide Application: gold detecting equipment, practical jewelry making accessories, great for testing jewelry, , antique gold, , collections, etc. - Package Included: gold inspection kit, containing 1 gold testing stone and 1 gold testing water (3ml). Size Chart: Test water: 3ml Test stone: 7.8cmx4.3cmx0.5cm/3.07inchx1.69inchx0.20inch Package Includes: 1 Gold Testing Stone 1 Gold Testing Water(3ml) Note: Please allow slightly errors due to manual measurement and different monitors.