Diamonds are among the rarest materials on Earth.
The oldest diamonds are believed to be over 3 billion years old - nearly as old as the earth itself. Each diamond is the result of an amazing journey, turning a natural element into the world's most sought-after treasure.
The journey begins hundreds of kilometres below the earth's surface, when heat and pressure cause pieces of carbon to form into diamond crystals held in molten rock.
The same extreme heat and pressure causes the surrounding rock to crack, pushing the diamonds up to the earth's surface under some of the most explosive forces in nature. As the molten rock cools and hardens it forms what is known as a kimberlite pipe - the primary source of diamonds.