<p> </p> <p>Verify if an item is real gold, silver or platinum with this touch stone test kit.</p> <p>Test jewelry, coins, antique gold, silver, platinum collectibles &amp; more.</p> <p>How to use:</p> <p>1. Rub the item to be tested on the black stone to leave a small sample on the stone.</p> <p>2. Apply a drop of acid onto the sample on the stone.</p> <p>3. Real gold, silver &amp; platinum will stay on the touchstone, false gold, silver or platinum will be dissolved or oxidized to blue.</p> <p>The purer the gold, silver or platinum, the more acid is required to dissolve it.</p> <p> </p> <p>Please note: This test kit can only tell if the item is gold, silver or platinum but cannot tell the exact purity such as the karat of the gold. </p> <p>USE WITH CARE: Touchstone testing incorporates the use of acids, so pay close attention to personal safety.</p> <p>Package contents:</p> <p>Acid Testing Water: 4.5 X 3 cm (3 ML)<br>Graphite Stone: 8 X 5.5 cm<br>Quantity: 1 set</p>