Lot 77. A 12.03 carats Burma octagonal step-cut sapphire ring, by Hemmerlé. Estimate CHF250,000 – CHF300,000 ($258,053 - $309,664). Photo Christie's Image Ltd 2016.

Set with an octagonal step-cut sapphire, weighing approximately 12.03 carats, to the polished angular mount, ring size 4. Signed Hemmerlé

Accompanied by report no. 16025274 dated 23 February 2016 from the Gübelin GemLab stating that the origin of the sapphire is Burma (Myanmar), with no indications of heating, and an Information Sheet on 'Unheated sapphires'.

Report no. CS1073479 dated 16 February 2016 from the AGL American Gemological Laboratories stating that the origin of the sapphire is Burma (Myanmar), with no gemological evidence of heat and no clarity enhancement.

Christie's. GENEVA MAGNIFICENT JEWELS, 18 May 2016, Geneva