Lot 315. Collection of H.S.H. Gabriela Princess zu Leiningen. A superb 20.42 carats rectangular-cut Type IIa diamond ring, by Boucheron. Estimate CHF2,000,000 – CHF3,000,000 ($2,074,021 - $3,111,032). Photo Christie's Image Ltd 2016. 

Set with a rectangular-cut diamond, weighing approximately 20.42 carats, to the pear-shaped diamond shoulders, with an additional marquise-cut and pear-shaped diamond cluster encasing ring, 1998, ring size 6 ½, with French assay marks for gold. With maker's marks for Boucheron

Accompanied by report no. 2175529970 dated 21 March 2016 from the GIA Gemological Institute of America stating that the diamond is D colour, VS1 clarity; also with a working diagram indicating that the clarity of the diamond is potentially Internally Flawless, and a Diamond Type Classification letter stating that the diamond has been determined to be Type IIa.

Further accompanied by copies of invoices dated 2015 and 1998 from Boucheron.

Superb Jewels from the Collection of H.S.H. Gabriela Princess zu Leiningen 

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