This massive stash of diamonds is stored in rock formations called cratons.
An interdisciplinary team of researchers have found a enormous treasure trove of diamonds buried below Earth's surface, way more than ever thought possible, but getting to them would take technology far beyond what we now have at our disposal.
More than a quadrillion tons of diamonds to be exact - or one thousand times more than one trillion - USA researchers at the Massachusetts Institute of Technology reported this week.
"We can't get at them, yet, there is substantially more precious stone there than we have ever thought previously", said Ulrich Faul, an examination researcher in MIT's Department of Earth, Atmospheric, and Planetary Sciences. Considering the total volume of the Cratonic root in the Earth, the team believes that in these ancient rocks, about one trillion (1016) tons of diamonds are scattered 90 to 150 miles below the surface.
Faul's co-authors include scientists from the University of California at Santa Barbara, the Paris Institute of Geophysics, the University of California at Berkeley, the Paris Polytechnic Institute, the Carnegie Institution of Washington, Harvard University, and the University of Science and Technology.
What the researchers came to is that the presence of diamonds inside the ancient "roots" could explain the sound speed mystery since sound travels faster when diamonds are in the vicinity.
The undertaking to reveal profound Earth jewels started on the grounds that researchers were confused by perceptions that sound waves would accelerate essentially when going through the underlying foundations of old cratons.
These pipes are often found at the end of cratonic roots - roots being the deepest section - in Canada, Siberia, Australia and South Africa, further confirming the theory at cratonic roots are in part made of diamond.
MIT scientists reportedly made the discovery while examining sound waves traveling through the planet during seismic events. They are usually cooler and less dense than surrounding rock and result in faster sound waves.
"Diamonds are special in many ways", said Fore. That's at least 1,000 times more diamonds than scientists had expected.
The diamond trove was found through an anomaly in seismic data, which was used to determine the constitution of the Earth's interior, according to the study.
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