Among the more curious materials that occur naturally on the Earth are volcanic rocks called kimberlites. Unusually rich in magnesium, many of them also host notable quantities of elements as ...

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 ...

It was likely transported by ice either from far away (unlikely because of associated 19 microdiamonds) or by ice that scoured an immediately adjacent weathered dyke-like kimberlite target at its ...

It was likely transported by ice either from far away (unlikely because of associated 19 microdiamonds) or by ice that scoured an immediately adjacent weathered dyke-like kimberlite target at its ...