Lot 328. An exceptional 27.49 carats D SI1 Type IIa diamond ring. Estimate CHF2,600,000 – CHF3,000,000  ($2,824,736 - $3,259,311). Price realised CHF 2,165,000. © Christie's Image Ltd 2015.

Set with a rectangular step-cut diamond, weighing approximately 27.49 carats, to the shield-shaped diamond shoulders, mounted in gold, ring size 4¼ 

Accompanied by report no. 11045499 dated 18 August 2014 from the GIA Gemological Institute of America stating that the diamond is D colour, SI1 clarity, and a Diamond Type Classification letter stating that the diamond is Type IIa 

Provenance: Christie's New York, Magnificent Jewels, 10-11 April 2000, lot 528 

Christie's. MAGNIFICENT JEWELS, 13 May 2015, Geneva