How can you tell real gold from fake?

To tell real gold from fake, hold a magnet near it. Gold doesn't attract magnets, so if you notice a pull, the piece is likely not gold or features a thin layer of gold plating over magnetic base metals. You can also look for hallmarks, which are usually numbers placed inside of hexagonal frames. 750 denotes 18-karat gold, while 585 indicates 14-karat gold. Another option for identifying gold is to have a professional jeweler or certified appraiser inspect your piece. On 1stDibs, find a wide range of gold jewelry.