Uranus and Neptune are a Girl's Best Friend
Some sparkly revelations about our outer solar system:
"Oceans of liquid diamond, filled with solid diamond icebergs, could be floating on Neptune and Uranus, according to a recent article in the journal Nature Physics. The research, based on first detailed measurements of the melting point of diamond, found diamond behaves like water during freezing and melting, with solid forms floating atop liquid forms. The surprising revelation gives scientists a new understanding about diamonds and some of the most distant planets in our solar system."
High pressure and high temperatures are the key, and Neptune and Uranus have both.