THE origin of the volcanic pipes of South Africa and the genesis of the diamonds contained in their “blue-ground” filling are as productive of controversy as that other geological puzzle—the ...

Special volcanoes known as kimberlites erupted, bringing diamonds to the earth's surface. In Crater of Diamonds State Park, visitors sift through the crater of an ancient, kimberlite volcano ...

The support we had from De Beers for this project meant that we achieved success in both respects." - Professor Steve Sparks, School of Earth Sciences Volcanology Group While kimberlites - effectively ...