deposito's in het oosten van continenten
  
  
Azië
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
  
Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen
  
Afrika
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
  
Cameroon, Cape Verde, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Uganda
  
Europa
Bulgaria, England, Germany, Norway, Romania, Switzerland
  
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom
  
anderen
Nog niet gevonden
  
Antarctica, Hawaï-eilanden
  
deposito's in het westen van continenten
  
  
Noord Amerika
USA
  
Canada, Costa Rica, Panama, USA
  
Zuid-Amerika
Brazil, Chile
  
Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay
  
deposito's in Oceanië continent
  
  
Australië
New Zealand, Queensland, South Australia, Western Australia
  
Central Australia, Western Australia