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
it is a Island on the north of Africa
Petra Diamonds owns on diamond mine is South Africa.
Botswana, the Democratic Republic of the Congo, and South Africa are the top diamond producers in Africa.
south africa
The first diamond discovered in South Africa was found at Hopetown. It was the 23,25 carat Eureka.
South Africa's diamond industry is undergoing turbulent times.
No,actually South Africa is the greatest diamond and gold mining country.
Botswana is located about a hundred miles north of South Africa and a hundred miles east of Namibia.
Africa in the counrty of South Africa!
South Africa is known for their diamond mines.
Africa
Diamond mining