Old mine brilliant-cut diamond of 10.35 carats and baguette-cut diamonds, platinum (French assay mark), maker’s mark (René Boivin), circa 1935, original René Boivin fitted case

GIA, 2022, report no. 5222641809: 10.35 carats, O-P colour, SI1 clarity, faint fluorescence

Size/Dimensions: FR ring size 53 / US ring size 614
Gross weight: 19.0 grams
Cf. Corbett, Patricia, et. al. Jewelry by Suzanne Belperron. London: Thames & Hudson, 2015, p. 166 for a similar ring.
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