Scientists believe that it rains diamonds on Neptune as well as Uranus. The hypothesis is that when large lightning storms, which happen often, strike methane (CH4), carbon (C) atoms are broken away and clump in soot. These carbon clumps then fall lower into the atmosphere where the extreme pressure and temperatures squeeze them into solid diamonds!
Now what’s cheaper… traveling to Neptune or to the local jewelry store? Well… it’s only 2.795 billion miles (4.498 billion km), so lets get packing!
Well now you do!