Platinum, 8.40ct Sapphire and Diamond Ring

Set to the center with a cabochon sapphire, embellished by 26 round eight-cut diamonds, 4 cushion-shaped old mine diamonds, 4 mixed-shape step-cut diamonds and three mixed-shape sapphire cabochons

• Cabochon sapphire weighing approximately 8.40 carats
• Diamonds weighing a total of approximately 0.85 carat
• Indistinct maker's mark, numbered 0257100, French
• Platinum
• Circa 1929
• Size 3¾ 
• Accompanied by Gubelin report no. 22091040, dated 26 September 2022, stating that the gemstone is a translucent blue natural sapphire with no indications of heating
• Accompanied by certificate of authenticity