Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
Japan, Oman
Afrika
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
South Africa
Eropah
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic
France, Germany, Italy
lain
-
pulau hawaii, mid-Atlantik ridge
Amerika Utara
Canada, USA
Canada, USA
deposito di oceania benua