1 cadangan
1.1 deposito di benua timur
1.1.1 Asia
China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam
China, India, Russia, Saudi Arabia, South Korea, Sri Lanka
1.1.2 Afrika
Kenya, Morocco, South Africa, Tanzania
South Africa, Western Africa
1.1.3 Eropah
Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom
United Kingdom
1.1.4 lain
tanah penggembalaan, mid-Atlantik ridge
belum menemukan
1.2 deposito di benua Barat
1.2.1 Amerika Utara
Canada, Mexico, USA
Canada
1.2.2 Amerika Selatan
Bolivia, Brazil
Brazil, Kolumbia, Paraguai
1.3 deposito di oceania benua
1.3.1 Australia
New South Wales, Queensland, South Australia, Western Australia
Central Australia, Western Australia