Enter your PIN http://weimar.org/great-research-papers/ help with a research paper  Their work shows that the sinking soot first turns into graphite, a form of carbon used in pencils. As the bits of graphite continue their journey to the center of the planet, the growing pressure and temperature squeeze and heat them into specks of solid diamond floating in a sea of helium and hydrogen. That transformation takes place at roughly 5,000 degrees on Saturn and nearly 7,000 degrees on Jupiter 但ﾂ�ﾂ� many times hotter than the temperature at which diamonds are forged inside the Earth.