Black Diamond Cut and Uncut-Carbonado

Carbonados, or black diamonds, have long been a mystery. They're the oldest, toughest and rarest diamonds around, black carbon formations that resemble diamonds, have been shown to have a chemical spectrum that indicates they originated before the formation of the Earth; their high hydrogen content suggests they are from a star-like environment. Since this carbon is only found in two locations on our planet, it may have arrived via an asteroid.