International News
53-Carat Yellow Diamond to Headline Phillips Geneva Auction, Expected to Fetch $3.5 Million
A stunning fancy-vivid-yellow diamond pendant will lead the May 12 auction, part of a prestigious collection celebrating 100 years of Art Deco design.
A remarkable 53.14-carat yellow diamond, set in a pendant and expected to reach up to CHF 3.1 million ($3.5 million), will be the star attraction at Phillips’ upcoming Geneva Jewels Auction IV on May 12. The internally flawless, fancy-vivid-yellow diamond, suspended from a round brilliant diamond, will lead the auction’s offerings, which will mark the 100th anniversary of Art Deco with a curated selection of rare and valuable pieces.
Alongside this extraordinary yellow diamond, the auction will feature items from prestigious design houses such as Van Cleef & Arpels, Cartier, Bulgari, Graff, and Buccellati, as well as pieces from renowned collections. Phillips will preview select items in cities including Hong Kong, New York, Singapore, and London.
Benoit Repellin, worldwide head of jewelry for Phillips, expressed excitement about the auction, highlighting the superb collection of colored gemstones and Art Deco masterpieces. Other standout items in the sale include a pair of D-Flawless diamond earrings, a Van Cleef & Arpels ring featuring a 7.10-carat Kashmir sapphire, and a heart-shaped fancy-vivid-orangey-pink diamond ring, among others.
The auction will also offer a range of rare gemstones, including a 122.77-carat Paraiba tourmaline, Burmese rubies, and a Serpenti wristwatch by Bulgari, all of which are expected to attract strong interest from collectors.
International News
Swiss International Gemlab Launches with Proprietary AI for Precise Colored Gemstone Grading
Swiss International Gemlab promises Faster, More Accurate Certification, Ensures Report Consistency
Three veteran gemologists today announced the opening of Swiss International Gemlab (SIG), a cutting-edge facility leveraging proprietary artificial intelligence (AI) to enhance grading accuracy and consistency for colored gemstones.
Founded by Willy Bieri, Lawrence Hahn, and Matthias Alessandri—senior experts who have collaborated for over a decade—SIG will operate from state-of-the-art locations in Lucerne, Switzerland, and Hong Kong. The lab promises faster results, unmatched transparency, and scientific rigor, insulated from external influences.
SIG delivers a full spectrum of services, including gemstone identification, origin determination, treatment analysis, and advanced color grading. At its core is SIG-AI Assistance, a proprietary system that cross-references analytical data against structured databases to detect anomalies, ensure report consistency, and slash interpretation time.
With a standard turnaround of five business days—plus expedited options for urgent needs—and real-time status tracking, SIG sets a new benchmark for efficiency and reliability in gem certification. The lab will make its global debut at this year’s GemGenève in May, offering on-site services to industry professionals.
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