china
Botswana
The country that produces the most synthetic diamonds is the United States. The Apollo Diamond Company in Boston Massachusetts produces the most according to Smithsonian.com
Australia is a single country. It is divided into six states and two territories. The state which produces the most diamonds is Western Australia.
Africa.
India
Generally, countries are not in the business of buying diamonds.
Your answer depends on whether you mean the country that mines the most diamonds -- probably Botswana (this position can rotate among several African countries), or cuts and polishes the most diamonds -- probably India, or brokersthe most diamonds -- probably (Amsterdam in) Holland.
Africa has the largest producer in the worldAfrica is not a country - it is a continent. Zimbabwe (a country within the continent of Africa) has largest known concentration of diamonds in the world.Actually, I believe that Botswana is the largest producer of diamonds in the world. If Zimbabwe had as much in reserves of diamonds as Botswana, they would probably have their own currency.
South Africa exports the most amount of diamonds per year. You can find out more information at countrystudies.us/south-africa/66.htm
There are no diamonds mined in any European country.
Every country uses diamonds, about 25% usually for jewelery and the remainder for industrial applications.
Probably not, because 80% of all diamonds mined are industrial diamonds. Every civilized country purchases industrial diamonds. Consumers in the United States, however, purchase about 50% of all gem-quality diamonds mined, according to the World Diamond Council.