Red, green, and blue diamonds with medium to dark tones and moderate saturations are extremely rare. Grading fancy color diamonds is complex ... That’s why cutters try to leave as much of the natural ...

A fancy vivid 10-carat cushion-modified blue diamond – known as the Mediterranean Blue – will appear at Sotheby’s in Geneva on 13 May. As one of the largest ...

Brown diamonds are generally more affordable compared to other fancy colors. The presence of boron impurities is often responsible for the color of natural blue diamonds. The more boron, the deeper ...

"The Mediterranean Blue" will be auctioned by Sotheby’s this Spring in Geneva with a classification representing less than ...

It is the Aurora Pyramid of Hope, a collection of 296 naturally coloured fancy diamonds ... a paler yellow called cape is produced. Some diamonds glow under UV light These diamonds also glow ...

An ultra-rare diamond worth an estimated $20m is coming to Abu Dhabi. The 10.03-carat precious gem is on a world tour, with ...

(IDEX Online) - One of the world's largest blue diamonds - a fancy vivid 10.3-carat VS2 cushion modified brilliant gem - is to be sold by Sotheby's Geneva with a $20m estimate. The Mediterranean Blue ...

They observed that the gem shows evidence of wear, has a remarkably strong phosphorescence, and that its clarity is slightly affected by a whitish graining which is common to blue diamonds. They ...

Natural colored diamonds come in a stunning spectrum, from soft pinks and brilliant yellows to enchanting blues and fiery oranges. The color of a diamond tells the story of its formation, and each ...