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a close up of a diamond ring on a white backgrounda close up of a diamond ring on a white backgrounda close up of a diamond ring on a white surfacea white gold and diamond ringa close up of a diamond ring on a white background
BOISGIRARD - ANTONINI

Estimate €2,000 - €3,000
Sale commission
Description
TANK RING A striking Art Deco-style ring in platinum, featuring a rectangular shape with bevelled edges. It is centred on a large vintage cushion-cut diamond set in a square setting, surrounded by geometric, stepped shoulders entirely pavé-set with vintage-cut and eight-eight-cut diamonds. Openwork setting with a gallery cut with diamond-shaped motifs. The centre diamond: old-cut cushion; dimensions 8.54 × 7.48 × 5.84 mm; weight 2.82 ct; colour G; clarity SI1; very strong fluorescence; no indication of treatment. Comments: additional facets, marked scratches (report from the French Gemmological Laboratory no. 426399 dated 15 June 2026). Twenty surrounding diamonds, each weighing between 0.05 and 0.15 carats. French craftsmanship, platinum; dog’s head hallmark. No maker’s mark. Circa 1935. Ring size: 51 — Gross weight: 18.9 g.
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About the sale Charity sale in aid of the Petits Frères Des Pauvres charity
Auction location
Auction time 10/25/2026 at 10:00 AM
Pictures credits:
Boisgirard Antonini
See original version (French)
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