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4.25 billion year old diamond discovered mongabay.com August 22, 2007 The diamonds, found trapped in zircon crystals in Western Australia, are the oldest identified fragments of the Earth's crust. Their existence suggests that Earth may have cooled faster than previously believed, said researchers led by Martina Menneken of Westfalische Wilhelms-Universitat Muenster, Germany. "These latest findings indicate that the planet was already cooling and forming a crust much earlier than previously thought," said Alexander Nemchin, a geochemist at Australia's Curtin University of Technology and a co-author of the study, published in Nature.
The diamonds are about 1 billion years older than the previous oldest-known diamonds. This article is based on a report from Reuters and a news release from Curtin University.
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