Depozite în Continente de Est
Asia
China, India
Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand
Africa
Morocco, Namibia
Cameroon, East Africa, Tanzania, Western Africa
Europa
Austria, Italy, Romania, Spain, Switzerland
United Kingdom
Depozite în Continente de Vest
America de Nord
Mexico, USA
Canada, USA
America de Sud
Brazil, Colombia
Bolivia, Brazil, Colombia, Ecuador
Depozite în Oceania Continent
Australia
New South Wales, Queensland, Yorke Peninsula
New South Wales, New Zealand, Queensland, Western Australia