Look for hallmarks or purity stamps such as 10K, 14K, 18K, 22K, 24K, 417, 585, 750, 916, or 999
Use a magnet; real gold is not magnetic
Check the weight; gold feels heavier than many fake metals of the same size
Rub the item on an unglazed ceramic plate; real gold usually leaves a gold streak, while fake metal may leave a black streak
Apply a small drop of vinegar; real gold should not change color
Use a gold testing acid kit according to the kit instructions
Compare the color and wear on edges; fading or different metal showing through may indicate plating
Test with a jewelry scale and density calculation if you know the item’s exact volume
Try a skin test for discoloration; fake gold often leaves green or black marks
Have it checked with a professional jeweler or pawn shop for the most accurate result