De Beers, Alrosa, Rio Tinto, Anglo American, BHP Billiton, Newmont Mining, Norilsk Nickel, Harry Winston Diamond Corp, Petra Diamonds.
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Alrosa russia and India have the best producing diamonds
While I could not get you the top five companies in the world I did find the top 5 tea producing countries and they are: China, India, Sri Lanka, Japan, Taiwan (and other top tea producing countries include Vietnam, Russia, Argentina, Kenya, Nepal etc. Warm climates with lush soil and mountainous regions are great for growing tea) A list of these tea producing countries can be found here: See related links
The top five producing countries by volume of production are Russia, Botswana, the Democratic Republic of Congo (DRC), Australia and Canada.Source: http://www.ehudlaniado.com/home/index.php/news/entry/world-s-top-diamond-producing-countries
The top five coal producing companies in 2012 were: China United States India Indonesia Australia
Schigerd is on the major companies that specialize in producing clutch cables. There are also various companies mostly from Chine that specialize in producing clutch cables.
There are several companies that create synthetic diamonds or cultured diamonds. One such company that creates the best synthetic diamonds is New World Diamonds.
The 20 biggest silver mining companies on the planet in 2006Ranking 2006 CompanyCountryProduction in mio. Oz1Industrias PeñolesMexico46,92KGHM Polska MiedzPoland39,93BHP BillitonAustralia37,04KazakhmysKazakhstan21,55PolymetalRussia17,3
South Africa
There are many companies that specialize in producing coach patchwork wallets. Examples of companies that specialize in producing coach patchwork wallets includes Trade Key and Every China.
The companies that specialize in producing cherry wood TV stands are Elliots and China. These two companies are the best in the world for producing cherry wood TV stands.
A quick search reveals the names of two companies, LifeGems and Memorial Diamonds, that can both create diamonds from human ashes. Both companies appear to be operating in USA.