Asia
India, Russia
India, Saudi Arabia, Singapore, South Korea
Afrika
South Africa
Ethiopia, Western Africa
Eropah
Germany, Greece, Italy, Scotland, Turkey
England, Georgia, Switzerland, United Kingdom
lain
tanah penggembalaan, mid-Atlantik ridge
belum menemukan
Amerika Utara
Canada, USA
Canada
Amerika Selatan
Bolivia, Brazil, Kolumbia, venezuela
Kolumbia
deposito di oceania benua
Australia
New Zealand, Queensland
Central Australia, New South Wales, New Zealand, Western Australia