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GIA team examines Winston Red, a  rare 2.33-carat red diamond

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A team of scientists from the Gemological Institute of America (GIA), collaborating with their colleagues from the Smithsonian National Museum of Natural History Department of Mineral Sciences and the curator from the Paris School of Mines, recently examined the Winston Red diamond – a very rare 2.33-carat red diamond which is now on display at the Smithsonian’s National Museum of Natural History in Washington, D.C. The Winston Red diamond is the fifth-largest diamond with an exceptionally pure red colour known to exist and the only such red diamond on public exhibit.

“The Winston Red diamond is one of the most exquisite gems on earth, from its unparalleled deep-red colour to its rich history,” said Susan Jacques, GIA president and CEO. “Natural fancy-coloured diamonds are very scarce, and red diamonds are exceedingly rare treasures of Mother Nature. Just two dozen pure red diamonds over one carat exist in the public record. Evaluating this spectacular gem is a scientific milestone for GIA and builds upon our expansive expertise in fancy-coloured diamonds.”

It’s fascinating to understand just how rare red diamonds are. Out of all the colored diamonds the GIA has examined, only a tiny fraction are red, and even fewer achieve the ‘Fancy red’ grade like the Winston Red.

Through careful analysis using advanced instrumentation and drawing on decades of research, experience and historical records, GIA scientists and their collaborators were able to determine the cause of the diamond’s rare colour and its possible geographic origin, which is most likely Brazil or Venezuela, based on its mineralogical characteristics and history.

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Van Cleef & Arpels Gives Its Iconic Alhambra a Pink Enamel Makeover

The Maison Introduces Five New Alhambra Creations Featuring Translucent Pink Enamel and Yellow Gold

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Van Cleef & Arpels has unveiled a vibrant new chapter for its iconic Alhambra collection, introducing translucent pink enamel to the signature four-leaf clover motif for the first time. The new creations combine the Maison’s emblem of luck with yellow gold, bringing a fresh, contemporary expression to the enduring design.

The new five-piece selection comprises a Vintage Alhambra pendant, five-motif bracelet, 10-motif necklace, 20-motif long necklace and Magic Alhambra two-motif earrings. The earrings additionally feature guilloché yellow gold, adding texture and contrast to the pink enamel.

The distinctive pink is the result of several years of research at Van Cleef & Arpels’ enamel workshops. Inspired by the historic 17th-century “gold-ruby” technique, the colour is created using fine particles of gold rather than traditional pigments. Carefully controlled particle size, shape and concentration produce the desired translucent hue.

Adding to its visual depth, the enamel contains tiny bubbles, giving each Alhambra motif a distinctive character while creating subtle variations as the surface catches and reflects light. The motifs are framed by the Maison’s signature gold beaded contours, further enhancing the interplay between the pink enamel and yellow gold.

Since its debut in 1968, Alhambra has continually evolved through different stones, materials and colours while retaining its instantly recognisable four-leaf clover silhouette. The introduction of enamel marks another significant step in that evolution, bringing together heritage craftsmanship, technical innovation and contemporary colour.

With its new pink interpretation, Van Cleef & Arpels continues to reinvent one of jewellery’s most recognisable motifs, demonstrating how traditional savoir-faire can give a familiar icon an entirely new expression.

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