Four Sales, 125 New Records

The final days of March 2026 delivered a concentrated burst of auction activity across three continents. Within the space of one week, four sales closed — Sotheby’s Paris, Bonhams London, Christie’s Hong Kong, and Phillips Hong Kong — offering a combined picture of the fine jewelry market that is, taken together, more informative than any single event in isolation. GemmoPrice has now completed the import of 125 new verified records drawn from these four sessions, bringing the platform’s total dataset to over 25,000 documented auction results.

Below, a summary of what each sale revealed — and what the new data means for the platform’s coverage of the current market.

Sotheby's Paris, March 31, 2026 — 45 New Records

Sotheby’s Paris presented its Fine Jewelry sale on March 31 at its Avenue de Matignon rooms, with a catalog that positioned Paris as a meaningful complement to the house’s Geneva and Hong Kong platforms for fine gemstone consignments. The selection reflected a deliberate mix of signed pieces from the great French and international maisons — Cartier, Van Cleef & Arpels, Chaumet, Harry Winston, Graff, and Marchak — alongside individual gemstone lots of genuine quality.

Among the highlights documented for GemmoPrice: an unheated Kashmir sapphire weighing 4.32 carats, a category that continues to generate strong institutional interest whenever certified material appears; a Van Cleef & Arpels ring set with a 7.39-carat cushion-cut diamond of D color, representing the top of the colorless diamond segment; and an exceptional natural pearl necklace featuring a largest pearl of 16.15 mm in diameter — a size that places it well above the typical natural pearl offerings seen at this level of the market.

The Art Deco section was equally notable. A fully articulated diamond bracelet by Cartier and a large brooch exhibited at the 1925 International Exhibition of Modern Decorative and Industrial Arts — one of the defining events of the Art Deco movement — both represent the kind of historical documentation that drives significant premiums in the signed jewel market today.

GemmoPrice has imported 45 records from this sale, covering the gemstone-significant lots across all categories.

Bonhams London, March 25, 2026 — 25 New Records

The March 25 Fine Jewellery sale at Bonhams London delivered results that underscored the current strength of the signed jewel and period piece segments. The 273-lot sale achieved 87% sold by lot and 98% by value — a sell-through ratio that reflects strong pre-sale vetting and accurate estimate-setting, rather than speculative pricing.

The top lot was a Cartier diamond ‘C de Cartier’ necklace, a design comprising articulated C-shaped links set with brilliant-cut diamonds, which achieved £40,960 — more than double its pre-sale estimate of £18,000–25,000. The result is consistent with the broader market trend of signed Cartier pieces outperforming estimates when accompanied by strong visual identity and good provenance.

A Tiffany & Co. diamond-set ‘Vanniere’ necklace, bracelet and earring suite from circa 1991, in 18-carat gold with articulated woven design, also doubled its estimate, selling at £32,000. The suite format — a matched necklace, bracelet and earring set from a single period and maker — is increasingly sought by collectors who value visual coherence alongside individual lot quality.

A natural pearl necklace with an old brilliant-cut diamond clasp featured among the sale highlights, consistent with the notable presence of fine natural pearls that Bonhams Head of Jewellery UK Jennifer Tonkin identified as one of four defining market trends: “Period jewels with historic interest and distinguished provenance drew strong competition, reflecting the market’s continued appreciation for pieces with compelling stories and heritage.”

GemmoPrice has imported 25 records from this sale, covering lots with documented gemstone content of professional interest.

Christie's Hong Kong "Jewels Online: The Hong Kong Edit" — 18 New Records

Christie’s Hong Kong “Jewels Online: The Hong Kong Edit” (auction 24371) ran from March 23 to April 1, 2026, and produced one of the strongest sell-through rates of any online jewellery sale in recent memory. Of 151 lots offered, 149 sold — a sell-through rate of 98.7%. The official sale total was HK$22,380,321 (approximately $2.86 million USD). Performance against estimate was exceptional: 74% of sold lots exceeded their high pre-sale estimate, 21% sold within the estimated range, and only 5% — seven lots — fell below their low estimate. The aggregate realized total reached 138.7% of the combined high estimate, and 209.7% of the combined low estimate.

The top lot by value was a diamond necklace (lot 1), which achieved HK$1,397,000 ($178,168), within its estimate of HK$1,300,000–1,900,000. The second and third highest results came from a diamond ring at HK$698,500 ($89,084) — 1.2 times its high estimate — and a diamond bracelet at HK$609,600 ($77,746).

The most striking outperformances of the sale were concentrated in signed jewel and multi-gem categories. A group of diamond and gold jewellery (lot 135) achieved HK$482,600 ($61,549) against a high estimate of HK$80,000 — six times the upper pre-sale limit. A multi-gem group including pieces by Bulgari and De Grisogono (lot 68) sold for HK$330,200 ($42,139) against a high estimate of HK$50,000, 6.6 times over. A diamond ring (lot 101) reached HK$444,500 ($56,725) against a high estimate of HK$120,000 — 3.7 times above — while the Buccellati chrysoprase and multi-gem group (lot 16) achieved HK$279,400 against a high estimate of HK$50,000, 5.6 times over.

Among the gemologically significant lots tracked by GemmoPrice, ruby was the most consistently active category. A ruby and diamond bracelet (lot 10) achieved HK$254,000 ($32,394) against a high estimate of HK$180,000; ruby and diamond earrings (lot 11) sold for HK$165,100 ($21,056) against a high estimate of HK$80,000 — more than double. A set of ruby and diamond jewellery (lot 54) also reached HK$254,000 against a high estimate of HK$120,000, again doubling the upper range.

In the sapphire segment, a sapphire and diamond pendent necklace (lot 59) achieved HK$304,800 ($38,873) — 3.8 times its high estimate of HK$80,000. A star sapphire and diamond ring (lot 60) sold for HK$152,400 ($19,436), nearly doubling its high estimate of HK$80,000.

The Wallace Chan unmounted topaz (lot 57) achieved HK$228,600 ($29,154) against a high estimate of HK$60,000 — 3.8 times over — confirming the consistent and substantial market premium that Wallace Chan’s name commands in Hong Kong regardless of the intrinsic category of the material. The Paraíba tourmaline and diamond ring (lot 58) sold for HK$82,550 ($10,528), just at its high estimate of HK$80,000.

GemmoPrice has imported 18 records from this sale — the gemologically significant lots meeting the platform’s documentation criteria — spanning colorless diamonds, colored diamonds, blue sapphire, Paraíba tourmaline, topaz, and jadeite.

Phillips Hong Kong, Concluded March 31, 2026 — Partial Coverage Within the 55-Record Block

The Phillips Hong Kong online jewels sale concluded on March 31 with 104 lots and delivered several results of direct analytical interest for colored stone professionals.

The top result of the sale was achieved by a Marina B synthetic quartz, onyx and diamond choker, which sold for HK$283,800 — between three and four times its pre-sale estimate of HK$60,000–90,000. The result reflects the current collector premium for pieces from Marina B, the Geneva-based maison founded by Marina Bulgari, whose work is increasingly recognized as a distinct collectible category within post-war Italian jewelry design.

The gemological highlights of the sale were concentrated in three categories. A Paraíba-type tourmaline and diamond ring achieved HK$64,500 (estimate HK$40,000–70,000), consistent with sustained demand for this category in the Asian market even for stones without confirmed Brazilian origin. A cobalt spinel and diamond ring sold for HK$54,180 (estimate HK$40,000–60,000), reflecting the continued appreciation of spinel as a collector category in Hong Kong, where the stone’s cultural resonance is historically deep. A pair of coloured diamond and diamond earrings achieved HK$129,000 against an estimate of HK$60,000–80,000 — the second-highest result of the sale and a clear signal of competitive bidding from multiple parties.

The Gianmaria Buccellati ruby and emerald ring combination (lot 7) is also notable: it achieved HK$83,850 against an estimate of HK$10,000–20,000, confirming that Buccellati signed pieces — even in online format — can generate multiples well above expectation when the right bidder pool is present.

A JAR pair of aluminum ear clips ‘Hydrangea’ (lot 105) sold for HK$96,750 against an estimate of HK$65,000–80,000, consistent with JAR’s consistent outperformance at auction regardless of material or venue.

GemmoPrice Database Update: 125 New Records

These four sales have contributed a combined 125 new verified records to the GemmoPrice database, distributed as follows:

45 records from Sotheby’s Paris (PF2610), 25 records from Bonhams London (auction 32028), 18 records from Christie’s Hong Kong “Jewels Online: The Hong Kong Edit” (sale 24371), and 37 records from Phillips Hong Kong (HK060226).

The additions expand GemmoPrice’s coverage of the spring 2026 auction cycle and reinforce the platform’s systematic tracking of all four major market segments: European live sales, British specialist sales, and Asian online formats from both the Christie’s and Phillips platforms.

For subscribers, the new records are live in the database and filterable by origin, category, treatment status, and sale venue, as with all GemmoPrice entries.

The next significant import cycle will cover the Geneva and New York spring major sales, traditionally the most data-rich events of the first half of the calendar year.