International News
Sotheby’s New York to Shine Spotlight on Colored Diamonds in June High Jewelry Auction
Sotheby’s is set to dazzle collectors at its upcoming High Jewelry auction on June 13 in New York, with colored diamonds and iconic designs taking center stage. Leading the sale is a Graff diamond ring featuring a 35.01-carat, emerald-cut, D-color, VVS-clarity diamond, flanked by triangle-shaped diamonds, expected to fetch up to $3 million.
Among the highlights is a selection of colored diamond pieces, including a 5.02-carat fancy-pink diamond ring by Valentin Magro (est. $2 million), and a 2.02-carat fancy-vivid-blue diamond ring by the same designer (est. $1.8 million). A 26.19-carat fancy-vivid-yellow diamond ring, accented with D-color diamonds, is estimated at $1 million.
The auction features several important private collections. From the estate of Emily Vanderbilt Wade, a Marcus & Co. necklace showcasing a 9.60-carat Burmese ruby surrounded by diamonds and rubies is expected to reach $2 million. Another notable collection, Joie de Vivre: A Journey in Jewels, includes 13 sentimental gifts spanning a 60-year marriage, with standout pieces like Graff earrings set with Colombian emeralds and diamonds, estimated at $2.5 million.
Additional highlights include:
- A pair of unmounted pear-shaped, D-flawless diamonds (10.32 and 10.11 carats) with a high estimate of $1.5 million.
- An unmounted 17.05-carat D-color, VVS1-clarity emerald-cut diamond, valued at $700,000 to $900,000.
- A rare 0.47-carat fancy-red diamond, with no reserve and an estimate of up to $700,000.
- A JAR ring with an 8.63-carat Colombian emerald, priced up to $700,000.
The auction will also showcase a group of five Art Nouveau jewels by René Lalique, offering collectors a chance to own a piece of design history.
Sotheby’s continues to attract global interest with this stellar lineup, celebrating rarity, craftsmanship, and storied provenance.
DiamondBuzz
Diamond Slump forces Debswana to diversify into copper, platinum and solar
Diamond-centric mining models is giving way to broader resource portfolios
Debswana Diamond Company, the 50–50 joint venture between the Botswana government and De Beers, is moving to diversify into copper, platinum and renewable energy as the prolonged downturn in natural diamond demand pressures earnings and forces the industry to rethink its growth strategy.
The company’s board has approved plans to invest in a portfolio of non-diamond projects after revenue fell 46% in 2024, the latest available financial year, highlighting the scale of the downturn in the global diamond market.
The move signals a strategic shift toward commodities with stronger long-term demand fundamentals, particularly copper, which is central to global electrification and energy-transition infrastructure.
Debswana’s diversification reflects a broader industry pivot as diamond producers confront weak consumer demand, rising competition from lab-grown stones and elevated inventories across the supply chain.
The shift is also visible among smaller exploration companies. Botswana Diamonds recently rebranded as Botswana Minerals, signalling its own strategic focus on copper exploration rather than diamonds.
Together, these moves underscore a growing consensus across the sector: the era of diamond-centric mining models is giving way to broader resource portfolios anchored in energy-transition metals.
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