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Responsible business practices ‘no longer optional’, says WDC President Feriel Zerouki
The president of the World Diamond Council takes time out of her busy schedule to tell Rough&Polished readers about the critical work of the WDC. Zerouki, the first female present of the body, which includes all the important industry organizations among...
14 october 2024
James Campbell: Botswana Diamonds optimistic as it enters uncharted territory of using AI for mineral exploration
London-listed Botswana Diamonds has expressed optimism about the company’s use of artificial intelligence (AI) to scan the exploration database in Botswana to look for new mineralised deposits. Company managing director James Campbell told Rough...
07 october 2024
Artur Salyakayev: For me, happiness is freedom to make my ideas happen and create valuable products
Artur Salyakayev is an art entrepreneur, founder of the International Jewelry Academy (IJA) and the INCRUA jewelry company. He has initiated and developed successful projects in jewelry industry and services sector. He is also a leading expert...
30 september 2024
Paul Zimnisky: China key for sustained recovery in demand for natural diamonds, prices
The curtailing of upstream and midstream natural diamond production in the past months is starting to have an effect on prices, according to the New-York-based independent diamond and jewellery analyst and consultant, Paul Zimnisky. He told Rough & Polished’s...
23 september 2024
Vladimir Pilyushin: The jewelry market is not stand-alone and moves by the same laws as other markets
Vladimir Pilyushin is editor-in-chief of Russian Jeweler, a leading magazine about the jewelry industry in Russia. He told Rough&Polished about his view on the evolution of the jewelry industry in Russia and touched upon some of its problems.
16 september 2024
Christie’s in Geneva to offer in May the largest and most valuable private collection of jewels
An exceptionally rare Van Cleef & Arpels ruby, emerald, onyx and diamond Egyptian Revival sautoir.
In May 2023, Christie’s in Geneva will offer the unrivalled jewellery collection of Heidi Horten.
Heidi Horten (1941-2022) was one of the most important figures in the history of jewellery collecting. Christie’s will offer 700 lots from Horten’s collection across a series of auctions during Luxury Week in Geneva, with a two-part live sale taking place on 10 and 12 May, alongside an online sale from 3 to 15 May.
The sales will showcase unique and exceptional pieces from 20th-century designers including Cartier, Harry Winston, Boivin and Van Cleef & Arpels.
Ahead of the landmark sales in Geneva, highlights from the collection will tour Christie’s showrooms across Asia, as well as in Dubai, New York, Vienna and London.
With a pre-sale estimate of more than $150 million, this is the largest and most valuable jewellery collection ever to be offered at auction.
Leading the collection is a superb and extremely rare ruby and diamond ring by Cartier. The cushion-cut stone, known as ‘The Sunrise Ruby’, weighs 25.59 carats and has a saturated pigeon-blood red colour and fine purity.
Another extraordinary piece is the magnificent 90.38-carat ‘Briolette of India’ diamond necklace by Harry Winston.
Alex Shishlo for Rough&Polished