DiamondBuzz
De Beers launches DiamondProof; distinguishes naturals from LGDs within seconds
De Beers has launched a diamond verification device aimed specifically at retailers. DiamondProof distinguishes natural gems from LGD in store within seconds as the customer looks on. DiamondProof distinguishes between the chemical composition of natural diamonds and LGD. De Beers says fewer than 1 per cent of diamonds will need additional evaluation and it guarantees that no synthetic diamonds will be mistakenly identified as natural.
De Beers Group announced that its innovative retail-facing diamond verification device, DiamondProof, has landed in select retail stores for the first time, giving consumers the ability to witness just how quickly the device can distinguish natural diamonds from non-natural diamonds, such as laboratory-grown diamonds (LGDs) and diamond simulants, providing a tool for retailers to help educate their customers on the differences between natural diamonds and other products. With research showing that almost half of consumers are unaware that LGDs can be readily detected, this easy-to-use device will enable retailers to show their customers just how quickly natural diamonds can be identified.
The first DiamondProof prototype instrument was unveiled at the JCK show in Las Vegas in June 2024 and has been developed to rapidly and easily screen both loose diamonds and those set in jewellery. With a zero percent ‘false positive rate*,’ the device will never mistake a lab-grown diamond as a natural diamond and delivers results within seconds.

Sandrine Conseiller, CEO of De Beers Brands, said: “Natural diamonds and LGDs are two fundamentally different products. Natural diamonds are rare, one-of-a-kind miracles of nature that come to us from the earth through heat, pressure and time. This incredible journey is what makes them the ultimate marker of life’s most profound emotional moments. Consumers should be able to have confidence in such a meaningful purchase, and DiamondProof allows retailers to offer them greater peace of mind. We are in a new era of transparency at retail, and customers deserve to know what they are buying.”
DiamondBuzz
Rising Inventory Putting Fresh Pressure On Polished Diamond Prices
Indian Manufacturers Are Shuttering Factories For Up To A Month For Diwali, Dampening Rough Demand and Dragging Down De Beers’ October Sight Sales.
Rising inventory is putting fresh pressure on polished diamond prices following a strong mid-year recovery. The Rapaport Spec Diamond Index (RAPI™) dropped across major smaller sizes in October—led by a 5.5% plunge in 0.30-carat stones and a 2.3% slide in 0.50-carat goods after late-September peaks.
Mid-sized 1-carat diamonds edged down 0.9%, while larger 3-carat stones bucked the trend with a modest 0.9% gain. Despite the retreat, 0.30-carat diamonds remain up 8.8% year-to-date.
Inventory Floods Small Sizes: Supply of 0.30-carat rounds surged 165% between June 1 and November 1, driven by ramped-up factory production and cutters sending smaller stones back for grading as prices recovered.

Rough Sales Slow Ahead of Diwali: Indian manufacturers are shuttering factories for up to a month for Diwali, dampening rough demand and dragging down De Beers’ October sight sales. Industry observers expect the holiday pause to help balance bloated inventories.
Luxury Brands Outshine the Trade: While upstream pricing softens, major luxury conglomerates continue to thrive. LVMH and Kering posted robust Q3 jewelry revenue, setting high expectations heading into the critical holiday shopping window.
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