Check for a hallmark or stamp (e.g., 24K, 22K, 18K, 14K, “999,” “916,” “750”)
Verify the hallmark with a reputable reference or jeweler
Look for consistent stamping (avoid pieces with vague, mismatched, or poorly placed marks)
Perform a magnet test (real gold is not magnetic)
Do a density/specific gravity test (compare to known gold ranges for the stated karat)
Use an acid test kit for the karat marking (observe reaction per kit instructions)
Check with an XRF (X-ray fluorescence) analyzer at a jeweler or testing service
Inspect for plating wear or base-metal discoloration at edges, clasps, prongs, or worn areas
Check for uniform color under bright light (real gold typically shows consistent tone)
Compare weight against similar-size items (gold is dense; fakes are often lighter)
Use a reputable jeweler appraisal or testing service for confirmation