deposito's in het oosten van continenten
  
  
Azië
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, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
  
Afrika
Cameroon, Cape Verde, Chad, Djibouti, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Tanzania, Uganda
  
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
  
Europa
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom
  
Bulgaria, England, Germany, Norway, Romania, Switzerland
  
anderen
Antarctica, Hawaï-eilanden
  
Nog niet gevonden
  
deposito's in het westen van continenten
  
  
Noord Amerika
Canada, Costa Rica, Panama, USA
  
USA
  
Zuid-Amerika
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador
  
Brazil, Chile
  
deposito's in Oceanië continent
  
  
Australië
Central Australia, Western Australia
  
New Zealand, Queensland, South Australia, Western Australia