Asia
China, India
China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam
Afrika
Morocco, Namibia
Kenya, Morocco, South Africa, Tanzania
Eropah
Austria, Italy, Romania, Spain, Switzerland
Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom
lain
belum menemukan
tanah penggembalaan, mid-Atlantik ridge
Amerika Utara
Mexico, USA
Canada, Mexico, USA
Amerika Selatan
Brazil, Kolumbia
Bolivia, Brazil
deposito di oceania benua
Australia
New South Wales, Queensland, Yorke Peninsula
New South Wales, Queensland, South Australia, Western Australia