Oxford University Press - Online Resource Centres

Gillespie: Foundations of Economics 2e

Unit 05

De Beers "was established in 1888 and is the world's leading diamond company with unrivalled expertise in exploration, mining and marketing of rough diamonds. 
It produces approximately 40% of the world's supply of rough diamonds from its mines in South Africa, and in partnership with the governments of Botswana, Namibia and Tanzania. 
Approximately 45% of the world's rough diamond production (made up from diamonds from De Beers mines and those which De Beers purchases from Alrosa, the Russian state diamond mining company) are sorted and valued by the Diamond Trading Company, the sales and marketing arm of De Beers, headquartered in London."

Iron and Steel Statistics Bureau
To look at the supply of iron and steel

OPEC's mission is to coordinate & unify the petroleum policies of Member Countries & ensure the stabilization of oil prices in order to secure an efficient, economic & regular supply of petroleum to consumers, a steady income to producers & a fair return on capital to those investing in the petroleum industry.

Starting up
To find out about starting up in business you can visit the government's Business Link website

Wikipedia’s explanation

The impact of the tsunami in Japan on supply in the car industry

For more on the importance of the price elasticity of supply on the equilibrium price and output in a market visit our visual walkthrough on the elasticity of supply and demand.