Among them are a 8.2-carat blue sapphire ring, set to go for anywhere from $300,000-$500,000, and a 10.95-carat round brilliant-cut diamond set in gold, which will go for somewhere between $40,000 ...

The average diamond carat weight for an engagement ring in the United States is about one carat. In the United Kingdom, it's 0.6 carats, and when looking at Europe as a whole, it's even smaller ...

A ring with a 7.31-carat emerald shaped diamond has an estimate of $120,000 - $180,000 . ... It is flanked by two princess cut diamonds weighing approximately 0.75 carat.

Colored diamonds also did well in the morning session led by a 28.20-carat fancy yellow diamond ring flanked on either side by a triangular-cut diamond, mounted in platinum and 18k gold, which ...