International News
Historic Mughal Emerald Jewels to Lead Christie’s Magnificent Jewels Auction in New York
Over 2,000 carats of rare Mughal-era emeralds and multi-gem treasures — including a 470-carat centerpiece — headline a landmark sale alongside prestigious pieces from Anne Bass and Lucille Coleman collections.
Christie’s will showcase an extraordinary array of Mughal jewels at its upcoming Magnificent Jewels auction in New York on June 17, led by a remarkable carved emerald necklace bearing over 1,150 carats of Colombian emeralds. The historic piece is inscribed with the name Ahmad Shah Durrani, founder of the Durrani Empire, and features a massive 470-carat central emerald. Dating back to 1612, this jewel is steeped in royal heritage and has been linked in historical records with other legendary gems such as the Timur Ruby and the Koh-i-Noor diamond. It carries a pre-sale estimate of up to $3 million.
Two additional Mughal masterpieces will also feature in the sale. One is a multi-gem necklace set with four Colombian emeralds totaling nearly 800 carats, expected to fetch up to $3 million. The other is a remarkable necklace strung with over 2,000 carats of spinel and natural pearls, with eight stones engraved with the names of influential rulers including Delhi Sultan Muhammad ibn Tughluq, Mughal emperors Babur, Jahangir, and Shah Jahan. That piece is estimated to sell for as much as $2 million.
These jewels will be presented alongside the personal collection of philanthropist Anne Hendricks Bass, which includes 26 pieces from esteemed design houses such as Van Cleef & Arpels, Bulgari, Cartier, and JAR. A standout from this collection is a pair of Van Cleef & Arpels diamond pendant earrings, estimated at up to $1.8 million, and a JAR sapphire, emerald, and diamond necklace, valued at up to $300,000.
Also featured in the auction is a group of nine Van Cleef & Arpels Mystery-Set jewels from the collection of philanthropist Lucille Coleman, described by Christie’s as a “significant” highlight of the sale.
With its blend of historical depth and iconic 20th-century design, the June auction promises to be one of the most compelling jewelry events of the year.
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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