Depozite în Continente de Est
Asia
Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen
China, India
Africa
Cameroon, Cape Verde, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Uganda
Morocco, Namibia
Europa
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom
Austria, Italy, Romania, Spain, Switzerland
Alții
antarctica, insulele hawaii
nu a fost încă găsite
Depozite în Continente de Vest
America de Nord
Canada, Costa Rica, Panama, USA
Mexico, USA
America de Sud
Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay
Brazil, Colombia
Depozite în Oceania Continent
Australia
Central Australia, Western Australia
New South Wales, Queensland, Yorke Peninsula