Guinness Book of World Records: Largest Recorded Black Opal Specimen “The Sea of Opal&
Guinness Book of World Records: Largest Recorded Black Opal Specimen “The Sea of Opal” (11,340.95 Carats) - Joe’s Run, Grawin Field, near Lightning Ridge, New South Wales, Australia -- source link
#minerals#rocks#black opal#australia#opal australia#geology