How to test for gold. There are only very few ways where you can be sure of the carat of gold. Hallmarks. Your first port of call when testing for gold should be to examine the hallmark of an item. Hallmarks are provided for jewellery that is sold within the UK. A Hallmark will show you the carat of gold, the maker and the year it was hallmarked.. Float Test: Real gold sinks in a glass of water because gold has a high density. Vinegar Test: Put a few drops of vinegar on your gold and let it sit for 15 minutes. Real gold will not change color. Gold Discoloration: Gold is soft, so over time it can wear away. If you can see other colors in spots where the gold has worn away, this is a sign.
The Water or Float Test. Another simple way to test gold is the water test. You can test gold at home by using a water method known as the "density test" or "specific gravity test." Since gold is denser than most other metals, it will sink when submerged in water. To perform this test, you first weigh the gold jewellery on a scale to determine.. Gold plated means a low-end metal like brass or copper is electroplated with a layer of gold. The layer of gold is thin, usually about 0.05% of actual gold or less. To know if your jewelry is gold or gold plated, use various gold testing methods such as the float test, density test, and makeup test.