A sapphire and diamond ring. Photo Christie's Image Ltd 2014 Set with a rectangular-cut sapphire, weighing approximately 20.13 carats, to the modified square-cut diamond shoulders, mounted in 18k gold. Estimate $60,000 – $80,000 With repo rt CS 60778...

A sapphire and diamond ring. Photo Christie's Image Ltd 2014 Set with a rectangular-cut sapphire in a brilliant-cut diamond surround, to the baguette-cut diamond shoulders, ring size 9¼. Estimate CHF5,500 – CHF7,200 ($6,311 - $8,261) Accompanied by report...

The Rockefeller Sapphire. Photo Christie's Image Ltd 2001 The rectangular-cut sapphire weighing approximately 62.02 carats, flanked by cut-cornered triangular-cut diamonds, mounted in platinum. Signed Tiffany & Co. Estimate $3,000,000 - $5,000,000. Price...

A Sapphire and Diamond Ring, Mounted by Boucheron. Photo: Christie's Images Ltd 2012 Set with a rectangular-cut sapphire, weighing approximately 31.21 carats, to the tapered baguette-cut diamond shoulders, ring size 5 with ring sizer, with French assay...