DiamondBuzz
All non-natural diamonds to be labelled only as “synthetic: CIBJO
The World Jewellery Confederation (CIBJO) plans to undo a decision it made back in 2010. It now wants all non-natural diamonds to be labelled only as “synthetic.”
This means the terms “laboratory-grown” and “laboratory-created” will be removed from CIBJO’s Diamond Blue Book (the global reference for diamond terminology and trade practices) and from related ISO Standards.
CIBJO also says the 4Cs grading system should apply only to natural diamonds, just as the GIA has recently decided.
Udi Sheintal, president of CIBJO’s Diamond Commission, explained that the earlier acceptance of “lab-grown” terminology was well-meaning but turned out to be a mistake.
He added that synthetic diamonds have often been marketed as more ethical, sustainable, and conflict-free—claims that, he argued, are usually not backed by evidence.

Udi Sheintal also stressed the need for clearer transparency. He said marketing should make it clear that synthetic diamonds are not grown in “laboratories,” but manufactured in industrial facilities using artificial processes.
DiamondBuzz
Big, Slightly Tinted Diamonds: Object Of Desire In The US Market
Buyers Of 2.5-Carat and Up Pieces Are Increasingly Choosing Stones With J Color Or Lower, Sometimes Much Lower On The Color Scale
Big, slightly tinted diamonds are suddenly the object of desire in the US — and the industry is asking why.
Buyers of 2.5-carat and up pieces are increasingly choosing stones with J color or lower, sometimes much lower on the color scale, say retailers and traders. That shift signals more than a fashion tweak: it reflects how affluent shoppers now want their diamonds to read as “natural” at a glance.
Lab-grown gems typically come in the brightest, clearest grades, so a warmly hued, imperfect-looking stone has become a visible badge of authenticity — a deliberate antique vibe in a polished world where synthetics dominate. No surprise: The Knot reports that 61% of U.S. couples now pick lab-grown rings.
A report explores who’s buying these larger, lower-color stones, how cultural moments and celebrities — think Taylor Swift — helped fuel the taste for them, and why antique cuts seem particularly suited to carrying color. The piece also ties this appetite to broader marketing narratives, including De Beers’ push for so-called “Desert diamonds.”
It’s not all doom and gloom for mined diamonds. Larger sizes — especially 2 carats and above and long fancy shapes — have held up better than smaller goods over the past year. The report isolates this rising niche and asks the key question: can these warm-toned showstoppers withstand the continued rise of lab-grown competition?
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