Black Diamond or Carbonado is a very unusual stone. It is a poly-crystalline structure, meaning that each black diamond contains many small cystals fused together. The Black Diamonds are not from Planet earth. They arrived in meteors about 2.3 billion years ago. Diamond is a stone of exceptional power and miraculous abilities. It is a king of gems, the strongest precious stone. Ancient Greeks named it "adamas", meaning invincible, indestructible.