Instead of being red or green, the skin is jet black. Black Diamond apples (Malus Domestica) are a rare variety of Chinese ...

Only known to exist in Brazil and the Central African Republic, “carbonado” black diamonds date from around 2.6 to 3.8 billion years ago and are an extremely rare natural occurrence.

Sotheby's has revealed a historic and significant diamond on Monday that is poised to be the centerpiece of its upcoming ...