: Ensure the stone has a report from a reputable lab like GIA (Gemological Institute of America) or IGI (International Gemological Institute). For natural diamonds, GIA is the global benchmark, while IGI is a leader in certifying lab-grown diamonds.

: The gold or platinum setting must carry a BIS Hallmark to guarantee metal purity. This is physically stamped on the piece and includes the BIS logo and purity grade (e.g., 18K).

: Take the certificate number provided on the product page and verify it directly on the GIA Report Check or IGI Report Verification portals. The details must match the listing exactly.