In Neptune and Uranus it literally rains diamonds!
Uranus and Neptune may literally rain diamonds, which then pile up miles-thick. And those are not the only diamonds being produced in space. You or may not know that there are some planets covered in diamonds. Well some planetary scientists think we just might have a few of them in this very system.
These scientists believe that Uranus and Neptune might actually rain diamonds to such a degree that they’re piled up miles above ground level. Both of those planets are nearly four times as big as this one, too. How could it happen? Well you probably know diamonds are created due to extreme pressure. The atmospheres of both planets contain methane, which is a hydrocarbon.
The atmospheres, which are extremely dense, have temperatures up to 12,000 degrees fahrenheit and pressures up to 6 million times that of our own atmosphere. Basically all that means is the intense pressure and temperature of the planets turns the methane in the atmosphere to diamonds- raining diamonds from the sky.