The blue rectangular-cut gem with VVS2 clarity has an estimate of $10 million ... and a 12.65-carat no-heat cushion-shaped Kashmir sapphire mounted on a platinum ring surrounded by pear-shaped ...

From Grace Kelly's 10-carat sparkler to Kate Middleton's oval ... In more recent years, she's been seen wearing an oval-shaped blue sapphire ring. The Ring: A classic baguette band with 16 white ...

The 9.85-carat emerald-cut Kashmir sapphire has ... cut very light blue fancy diamond on a ring that sold for $162,500, smashing its $30,000 high estimate. * A 10-carat emerald-cut fancy yellow ...

AFP via Getty Images Visitors focused on the 10-karat blue diamond from South Africa ... A 40.29-carat radiant-cut fancy light pink diamond ring, left and a 102.60-carat round white diamond.

Bardem presented the actress with a three-carat, oval-cut blue sapphire in a white ... Ora didn't unveil her square-cut, 10-carat Colombian green emerald ring until a year after she and Taika ...

Royal women have often favored sapphires, especially when it comes to engagement rings: Princess Anne sports a blue sapphire ... ring features a 12-karat oval Ceylon sapphire set in 18-karat ...

A stone of royalty celebrated throughout the centuries, perhaps the most famous sapphire engagement ring of all is Princess Diana’s 12-carat sapphire ... recognisable rich blue we all know ...

NEW YORK (CBS) When Prince William proposed to longtime girlfriend Kate Middleton on holiday in Kenya last month, his late mother, the beloved Princess Diana played a role -- she provided the ring.