Saudi Arabia.
Kuwait
Sandi Arabia
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
Saudi Arabia
Nigeria
Saudi Arabia.
U.a.e
Saudi Arabia produces most oil.
Saudi Arabia
Venezuela.
oklahomna
Africa
Saudi Arabia
America i think
The country that produces the most oil is the United States.
China. China produces about 1.45 billion barrels of crude oil annually.