Practical Jewelry Gold Testing Tool Touchstone Portable Detecting Stone for Examination (L)

Practical accessories for jewelry making Gold detection stone in two sizes allows you to check the gold content of objects Application Apply a drop of Acid test to the touchstoneReal gold will stay on the touchstoneFake gold will dissolve or oxidize to blue Package List This solution allows you to test any gold you think is pure 10K, 14K, 18K, 22-24K, silver and platinum. Acid changes color depending on its purity. Very easy to use Application Ideal for testing jewelry, coins, antique gold, silver and platinum