Counterfeit gold exists, and knowing how to verify authenticity is an essential skill for any precious metals owner.
Professional Methods
- XRF Analysis: Non-destructive X-ray fluorescence testing that reveals exact composition. Available at many dealers and refiners.
- Specific Gravity Test: Gold’s density (19.3 g/cm³) is extremely difficult to replicate. Weigh the item in air, then in water, and calculate density.
- Sigma Metalytics Verifier: A device that measures electrical conductivity through the full depth of the metal. Widely used by dealers.
Basic Tests
- Magnet Test: Gold is not magnetic. If it sticks to a magnet, it is not gold. (Note: this test alone is not conclusive — many non-gold metals are also non-magnetic.)
- Ping Test: Gold produces a distinct, sustained ringing tone when tapped. Silver and tungsten sound noticeably different.
- Visual Inspection: Check for proper markings, consistent color, and expected dimensions.
Best Practice
Buy from established, reputable dealers. Purchase graded coins from NGC or PCGS. Buy bars from LBMA-accredited refiners with assay certificates. These practices virtually eliminate counterfeit risk.