This sharp-edged octahedral diamond crystal nestles in kimberlite, the rock that brought it to the earth’s surface. Not merely for their intrinsic beauty, but for the fundamental information locked within them.
Such crystals may preserve minerals from deep in the mantle and provide a record of temperature and pressure conditions there. Information that illuminates the earth’s early history and the planet’s structure at depths hundreds of kilometers beneath our feet.
Therefore it should come as no surprise that creationists at the Institute for Creation Research (ICR) have been trying desperately to discredit this method for years.
ICR creationists claim that this discredits C-14 dating. Answer: It does discredit the C-14 dating of freshwater mussels, but that's about all.
Kieth and Anderson show considerable evidence that the mussels acquired much of their carbon from the limestone of the waters they lived in and from some very old humus as well.
These “superdeep” diamonds provide Shirey and other scientists a tantalizing window into the workings of the deeper mantle.
Peter Johnston © GIA paper “Recent Advances in Understanding the Geology of Diamond,” coauthored by Shirey and GIA’s Dr. Shirey is a one of a collaborative group of geoscientists from institutions all over the world using diamonds as a means to sample the deep earth.