Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
Japan, Oman
Afrika
Angola, Egypt, Ethiopia, Madagascar, Namibia, Nigeria, South Africa
South Africa
Eropah
Bulgaria, England, Germany, Norway, Romania, Switzerland
France, Germany, Italy, Venezuela
lain
belum menemukan
pulau hawaii, mid-Atlantik ridge
Amerika Utara
USA
Canada, USA
Amerika Selatan
Argentina, Bolivia, Brazil, Chili, Kolumbia, Ekuador, peru
belum menemukan
deposito di oceania benua
Australia
New South Wales, New Zealand, Queensland, South Australia, Western Australia
Not Yet Found