It literally rains diamonds on Saturn and Jupiter.

In 2013, scientists Kevin Baines and Mona Delitsky discovered that Saturn and Jupiter have the perfect 'pressure cooker' conditions to make diamonds. It all starts high in the sky where methane gas gets hit by lightning. These lightning bolts are 10,000 times more powerful than the ones we see on Earth. The zap breaks the gas apart and leaves behind clouds of black soot.As the soot falls deeper into the planet, gravity pulls it down into areas where the air is incredibly thick and heavy. About 1,000 kilometers down, the pressure is so high that the soot turns into graphite. This is the same soft, gray stuff found inside your school pencils. But the journey doesn't stop there.When the graphite falls to 6,000 kilometers deep, the heat reaches 3,000 degrees and the pressure becomes 100,000 times stronger than on Earth. This crushing force rearranges the atoms into hard, clear diamond crystals. Researchers think Saturn might create 1,000 tons of diamonds every single year. Some of these stones could be about one centimeter wide.Because diamonds are heavy, they keep falling toward the center of the planet like rain. However, these planets are so hot at their centers that the diamonds eventually melt. Scientists at the Lawrence Livermore National Laboratory use powerful lasers to recreate these conditions. Their tests suggest that deep inside these gas giants, the solid diamonds might turn into a glowing sea of liquid carbon.