Does a hundred and sixty carat black diamond exist blue or a really big emerald about130 140 carat blood in color maybe from Africa exist?

Answer 1

The Spirit of de Grisogono is the worlds largest cut black diamond and the fifth largest diamond in the world. The diamond had a rough weight of 587 carats and was mined some time ago in western Africa before being brought to Switzerland where it was cut using the traditional Mogul diamond cutting technique. De Grisogono then set the cut diamond (312.24 carats) into a white gold setting encrusted with 702 white diamonds (36.69 carats). * http://www.sybarites.org/2006/07/26/spirit-of-de-grisogono-the-worlds-largest-black-diamond/As far as Emeralds, there are several that are famous, here's just one:

The Duke of Devonshire, a highly included, deep green hexagonal prism of 5 cm in diameter and 6 cm in height weighing 1,383.95 carats, is one of the most famous emeralds in the world. This uncut crystal from Muzo, Colombia, was given to the sixth Duke of Devonshire by Emperor Don Pedro in 1831.

Go to this site to see more:

* http://www.jewelry.com/fashion-report-famous-emerald.shtmlLargest Ruby:

The largest Ruby weighs 8184 g and measures 130 x 138 x 145 mm (5.11 x 5.43 x 5.70 in). It is owned by Beijing Fugui Tianshi Jewelry Co. Ltd. of Beijing, China.

* http://www.guinnessworldrecords.com/records/science_and_technology/amazing_science/largest_ruby.aspxAs far as a Ruby in a ring:

The Worlds largest and most exquisitely faceted ruby, A 23.1 carat gem, is now on display at the Smithsonian Institution's National Gem and Mineral collection in Washington, D.C.

* http://www.diamondvues.com/2005/01/worlds_ruby_rin.html