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Researchers used a machine called an
press to simulate the
under which Mercury was formed. The press is used to make
diamonds. Researchers mixed elements inside a graphite
. These included silicon, magnesium and aluminium. The capsule was subjected to
70,000 times greater than that on Earth. It was heated to temperatures of 2,000 degrees Celsius. The lead researcher speculated about the diamonds on Mercury. He said: "Diamonds are made of
only, so they should be
to what we know on Earth…They would [resemble]
diamonds." Scientists believe there are a
tons of diamonds beneath the Earth's surface. Experts say the value of these hidden gems is pretty much
.