Look for a karat stamp such as 24K, 22K, 18K, 14K, or 10K
Check for hallmarks or purity marks from a trusted maker or assay office
Use a magnet test; real gold is not magnetic
Perform a density test by comparing weight and volume
Rub the item on a testing stone and apply acid test solutions
Use an electronic gold tester
Check color consistency and signs of wear or fading
Test with a jeweler’s touchstone and comparison needles
Have a professional jeweler or assay office verify it
Use XRF testing for accurate non-destructive analysis