Check for hallmarks or stamps such as 10K, 14K, 18K, 22K, 24K, or 999
Use a magnet; real gold is not magnetic
Look for discoloration, tarnish, or worn plating on edges and high-contact areas
Compare the item’s weight to expected gold weight for its size
Perform a ceramic scratch test on an unglazed plate
Use a nitric acid gold testing kit
Test with a gold testing stone and acid solution
Measure density by water displacement
Listen for the sound test by dropping it gently on a hard surface
Check for skin discoloration after wearing it
Have a jeweler test it with an electronic gold tester
Get an XRF test from a professional jeweler
Inspect for signs of plating, seams, or base-metal exposure