DiamondBuzz
CIBJO Backs ‘synthetic’ As Sole Label For Man-Made Diamonds
CIBJO’s Laboratory-Grown Diamond Committee, Told Delegates That “Synthetic” Remains The Primary Term Recognized By Consumers, Despite A Formal Push From The Sector’s Steering Committee To Defer The Ruling and Authorize “Laboratory-Grown.”
The World Jewellery Confederation (CIBJO) has recommended “synthetic” as the only acceptable descriptor for non-mined diamonds, rejecting calls from trade leaders to permit the term “laboratory-grown,” the organization said on Monday.
The decision, finalized at the closing session of the 2026 CIBJO Congress, deepens a global divide over gemstone terminology at a time when manufactured stones are rapidly eroding the market share and pricing power of mined gems.
CIBJO’s Laboratory-Grown Diamond Committee, told delegates that “synthetic” remains the primary term recognized by consumers, despite a formal push from the sector’s steering committee to defer the ruling and authorize “laboratory-grown.”
CIBJO’s move aligns with a growing regulatory push in several major markets. France restricted terminology to “synthetic” in 2024, Russia followed suit in June, and the London Diamond Bourse endorsed the single descriptor on Sunday. In May, the African Diamond Producers Association also tightened descriptor rules to shield the natural diamond trade.
In contrast, regulators and retailers in the United States and India have favored consumer-friendly phrases such as “lab-grown” or “laboratory-grown.” The commercial stakes are particularly high in the U.S., where synthetic stones now account for more than half of all engagement ring sales by volume, applying severe downward price pressure on natural rough and polished stones.
CIBJO, which began moving to strike “lab-grown” from its influential Diamond Blue Book standards last year, warned that the diverging legal frameworks are leaving the global market increasingly fragmented.
DiamondBuzz
De Beers Cuts Diamond Production But Sees Sales Rise
The Main Reasons For The Drop Were Planned Repair Work In Botswana and Slower Operations At Its Venetia Mine In South Africa. Demand For Diamonds Grew In The US and India.
De Beers produced 11% fewer diamonds in the third quarter of 2026 compared to last year, bringing total production down to 6.8 million carats. The main reasons for the drop were planned repair work in Botswana and slower operations at its Venetia mine in South Africa before it temporarily pauses production for two years.
Despite lower production, overall diamond trading improved. Demand for diamonds grew in the US and India, and the market became better balanced. However, lab-made diamonds continued to hurt sales of cheaper natural diamonds.
Production Highlights by Country
Botswana: Down 20% to 4.8 million carats due to maintenance at the Orapa mine.
South Africa: Down 37% to 418,000 carats as the Venetia mine slowed down.
Namibia: Up 8% to 495,000 carats.
Canada: More than doubled to 1.06 million carats because the Gahcho Kué mine processed higher-quality ore.
On October 16, De Beers took full ownership of Canada’s Gahcho Kué mine after taking over its partner Mountain Province’s 49% share. Starting in the fourth quarter, De Beers will report all production from this mine on its own books. This will raise De Beers’ official production numbers, but it will not change the overall amount of diamonds in the world market.
Sales Revenue: Reached $731 million for the quarter, up 4% from $700 million last year.
Sales Volume: Nearly doubled to 8.7 million carats, up from 4.6 million carats a year ago.
Even though sales volume went up, the average price De Beers received per carat so far this year fell 37% to $97. This was caused by an 18% drop in overall rough diamond prices and the fact that De Beers sold a higher proportion of cheaper diamonds this year.
Because De Beers now owns 100% of the Gahcho Kué mine, it raised its full-year 2026 production target to 25–28 million carats (up from 21–26 million). It also lowered its expected production cost from $80 to about $70 per carat. The company said it will keep watching market demand and adjust its production as needed.
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