A log of wood believed to be 50 million years old has been hauled up from below ground at Diavik diamond mine in the N.W.T. — ...

"The kimberlite rock from which the wood was recovered has been dated to approximately 50 million years old using accepted age-dating techniques," they said. "Consequently, the materials ...

“The kimberlite rock from which the wood was recovered has been dated to approximately 50 million years old using accepted age-dating techniques,” they said. “Consequently, the materials ...

Kimberlite magmas are generated at great depths ... This is borne out by the mineral relationships in the rock and various diagnostic elemental ratios, which reveal that perovskite and salt ...

The new sample of kimberlite, a type of igneous rock, showed unmistakable properties similar to other portions of the NAC, the researchers said. The fragment adds about 10 percent to the known ...

There are diamond deposits that have been discovered that are younger—the rock itself, the Kimberlite, is maybe just tens of hundreds of millions of years old. The way they date diamonds is ...

Jwaneng is an open-pit mine, formed around a kimberlite pipe, a rare type of volcanic rock formation that can contain high concentrations of diamonds. The mine consists of three main kimberlite ...

An employee uses a computer screen to show a magnified kimberlite rock sample to visitors during a presentation on carbon storage in a laboratory, operated by De Beers SA, in Johannesburg ...

It sits on top of a special type of volcanic rock called a kimberlite pipe, which is known to contain diamonds. The mine has ...