Check for a hallmark or stamp such as 10K, 14K, 18K, 22K, 24K, or 417, 585, 750, 916, 999
Look for discoloration, especially on worn edges or clasps
Use a magnet; real gold is not magnetic
Test the weight; real gold feels heavy for its size
Rub it on unglazed ceramic; real gold leaves a gold streak
Apply a nitric acid gold test kit
Use a jeweler’s loupe to inspect for plating wear or markings
Compare the item’s density with known gold density
Have it tested with an electronic gold tester
Take it to a jeweler or pawn shop for professional testing