Pearl Disclosure — The CIBJO Standard
Pearl Disclosure — The CIBJO Standard
Mandatory trade requirements for natural-versus-cultured, treatments, and origin
Pearl disclosure is the trade requirement that the seller of a pearl or pearl piece state, clearly and accurately, whether the pearls are natural or cultured, what treatments have been applied beyond standard processing, and the geographic and species origin where determinable. The international standard is the CIBJO Pearl Book, with parallel codes from AGTA and the FTC's Jewelry Guides applying in the American trade. Failure to disclose the relevant facts is misrepresentation and is treated as a breach of the standard rather than a matter of preference.
Natural versus cultured
The single most important disclosure is whether a pearl is natural or cultured. The CIBJO Pearl Book requires that the term cultured pearl appear in any sale of cultured pearls, regardless of size, value, or context. The unmodified term pearl implies natural origin and may be used only for pearls verified to be natural by an accredited gem laboratory. The price differential between natural and cultured pearls of comparable size and quality runs from 10x to 100x or more, and the trade and the standards bodies treat the distinction with corresponding seriousness.
For practical purposes, all white round Akoya, all South Sea, all Tahitian, and all freshwater pearls in the contemporary trade are cultured unless explicitly described as natural and supported by laboratory documentation. Natural pearls today come principally from the auction market and the estate trade, with new natural-pearl supply largely from the Persian Gulf wild oyster fisheries that survive at modest scale.
Treatment disclosure
Standard processing — bleaching for white pearls, polishing — does not require individual disclosure under CIBJO and AGTA codes. The trade understands that white commercial Akoya and white freshwater pearls have been bleached, and the codes treat this as routine. Treatments that go beyond the standard — dyeing, irradiation, coating with polymer or oil, surface treatments such as filling — must be disclosed.
Dyeing must be disclosed in the description and on any accompanying paperwork. Irradiation, used to darken bead-nucleated Akoya or freshwater pearls, must be disclosed. Coatings, which significantly compromise long-term value and durability, must be disclosed. AGTA's enhancement-code letters provide a shorthand: D for dyeing, R for irradiation, and so on, with corresponding letters for other treatments.
Origin disclosure
Geographic origin disclosure is increasingly common but not always mandatory. Where origin is significant to value — South Sea production from Australia versus Indonesia, Tahitian production from French Polynesia versus elsewhere, freshwater production from China versus Japan — the seller is expected to state origin if known. Species disclosure (the mollusc species producing the pearl) is similarly expected for natural-pearl trade and for pearls where species affects type classification.
Implementation in retail
Compliant retail descriptions read as, e.g., "Cultured Akoya pearl strand, Japan, bleached and polished, 7-7.5 mm, 17 inches" or "Cultured Tahitian pearl, French Polynesia, natural colour, 12 mm, peacock overtone". Non-compliant descriptions omit the cultured designation, omit relevant treatments, or rely on euphemisms such as "genuine pearl" that imply natural origin without stating it. The American FTC has the authority to act on misleading descriptions in the US trade.
In the trade
Buyers should expect and ask for full disclosure on any pearl purchase above modest cost. Laboratory reports from GIA, SSEF, or Gübelin are the references for natural-pearl determinations and for treatment confirmation on high-value pieces. The cost of laboratory verification on a fine strand or a significant single pearl is well-spent insurance against misrepresentation.