Bonhams’ May 22 Hong Kong Auction Features Rare Colored Stones, Cartier Pieces

By Annie Davidson Watson | May 05, 2025

On May 22, Bonhams will send a selection of rare colored gemstones and iconic designer pieces to the block during its Hong Kong Jewels and Jadeite sale. Headlining the auction is a ring with a 1.08 ct. fancy vivid pink diamond—internally flawless and exceptionally pure in color—that’s estimated to achieve between $500,000 and $640,000.

Pink diamond — *Ring with 1.08 ct. fancy vivid pink diamond and diamonds, estimate $500,000–$640,000*

Another major highlight is the Kat Florence Lumina (pictured at top), a 181.61 ct. unmounted, untreated paraiba-type tourmaline from Mozambique with a rich greenish-blue hue. Considered one of the finest stones of its kind, the Lumina carries an estimate of $385,000 to $640,000.

Cartier panthere — *Cartier Panthère bracelet in platinum with 17.1 cts. t.w. brilliant-cut diamonds, 12 cts. t.w. sapphires, emeralds, and onyx, estimate $150,000–$320,000*

Several signature Cartier designs will be in the auction, including a platinum Panthère bracelet adorned with diamonds and buff-top sapphires—the two panther heads have emerald eyes and onyx noses. Bonhams will also offer a rare art deco brooch and a diamond Agrafe demi-parure from Cartier.

*Harry Winston earrings with 6.96 ct. and 6.98 ct. Burmese rubies plus diamonds, estimate $365,000–$490,000*

The sale also features ruby earrings by Harry Winston, a 7.03 ct. vivid yellow diamond ring, and a black opal and diamond ring by Mikimoto, as well as Colombian emerald earrings, unheated spinels, and a sapphire and garnet necklace by de Grisogono.

*de Grisogono necklace with 83.23 cts. t.w. multicolor Burmese sapphires, garnets, and diamonds, estimate $35,000–$49,000*

In addition to the live auction, Bonhams will hold an online sale May 17–26 offering 126 lots—among them, jadeite and diamond sets, statement earrings, and pieces with strong provenance—from a single Southeast Asian collector.

(Photos courtesy of Bonhams)

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