A diamond single-stone ring, by Van Cleef & Arpels.. Photo Bonhams

The step-cut diamond, weighing 7.00 carats, to the triangular-cut diamond shoulders, shoulder diamonds approximately 2.00 carats total, signed VCA for Van Cleef & Arpels, numbered N.Y.64154, ring size M. Lot 190. Estimate: AU$ 185,000 - 225,000 / £120,000 - 140,000 / US$ 180,000 - 220,000. Unsold

Accompanied by a certificate number from the Gemological Institute of America (GIA) stating that the diamond is E colour, SI1 clarity. Certificate number 10526757, dated 4 December 1998.

Bonhams. 27 May 2012 4 p.m. Sydney, Byron Kennedy Hall. Fine Jewellery