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CIBJO report considers listing gem labs complying with Blue Book Standards

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With less than a month to go before the CIBJO Congress 2025 opens in Paris on 27th October, the seventh pre-congress Special Report has been released by the CIBJO Gemmological Commission, chaired by Hanco Zwaan.

“There have in recent years been concerns expressed about gemstone reports issued by different labs for the same stones, with different and sometime contradictory findings,” said Hanco Zwaan. “This has brought into question the qualifications of the laboratories issuing the reports, taking into consideration that, worldwide, there is very little official oversight as to what are the requirements for an organisation to claim to be a gem testing laboratory.”

Central to the proposed listing would be the CIBJO Gemmological Laboratories Blue Book, which outlines management and technical guidelines for gem labs, aligning with ISO Standard 17025. Other relevant Blue Books cover diamonds, coloured gemstones, pearls, and precious coral.

According to Dr. Zwaan, the system would allow the trade and consumers to clearly identify laboratories that operate with quality management systems and transparency. “The results given in reports often have a significant impact on the value of the item being reported upon,” he explained.

A key document that would have to be applied by listed labs would be the CIBJO Gemmological Laboratories Blue Book, a mammoth opus that is compiled by the Gemmological Commission. Providing guidelines for the management and technical operations of gem labs, it complies with and expands upon ISO Standard 17025, which is the internationally recognised accreditation management systems for testing and calibration laboratories. Also relevant are CIBJO’s Blue Books for diamonds, coloured gemstones, pearls and precious coral.

The Gemmology Special Report also reviews progress on the forthcoming CIBJO Jade Guide, highlights the Laboratory Manual Harmonisation Committee’s work, and examines the increasing role of artificial intelligence and machine learning in gemmology.

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Candidates From India, China and The UAE Running For President Of The WFDB

The Election Reflects Power Shifts In The Trade As Well As Open Questions About The WFDB’s Character and Future.

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Three candidates from India, China and the United Arab Emirates (UAE) are running for president of the World Federation of Diamond Bourses (WFDB) in an election that reveals contrasting approaches to the organization and the industry. s (WFDB) in an election that reveals contrasting approaches to the organization and the industry.

Bharat Diamond Bourse (BDB) vice president Mehul Shah, Shanghai Diamond Exchange (SDE) president Lin Qiang, and Dubai Diamond Exchange (DDE) chairman Ahmed Bin Sulayem have put their names forward ahead. Israel’s Yoram Dvash is standing down after completing the maximum two three-year terms.

The key theme is a split between preserving the federation’s traditional, experience-led model and pushing a younger, reform-minded approach.

Candidate positions

Mehul Shah is presented as the continuity candidate: he wants to strengthen the federation, add members, and restore its earlier influence, but he argues that younger leaders should first gain experience in junior roles.

Ahmed Bin Sulayem is linked with a reformist, younger-leaning camp that wants fresh leadership and modernization, with David Troostwyk and Molefi Letsiki on the same informal slate.

Lin Qiang’s role is more institutionally grounded, with recent WFDB and Shanghai ties showing China’s growing involvement in the federation’s outreach and industry strategy.

Industry context

The election is happening against broader concern about the WFDB’s relevance as lab-grown diamonds reshape the market and as influence shifts toward bodies like the World Diamond Council.

WFDB leadership tracker: track the Executive Committee, presidential election rules, and potential future candidates from India, China, and the UAE.

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