Lot 107, a spectacular diamond and platinum ring, set with an oval-cut diamond weighing approximately 40.43ct, D colour, VVS1 clarity, with excellent polish and excellent symmetry (estimate: $5.8-7.8 million)

Lot 107, a spectacular diamond and platinum ring, set with an oval-cut diamond weighing approximately 40.43ct, D colour, VVS1 clarity, with excellent polish and excellent symmetry (estimate: $5.8-7.8 million).