INTERNATIONAL: Carbonado black Diamonds known as The Enigma are quite rare to begin with. They are shrouded in mystery as the origin or formation because there's not that many of them found on Earth.

The mysterious black diamond is also known as carbonado diamond or more famous as The Enigma. There are only two places in the world that carbonados of this structure have been found: Brazil and Central African Republic.

The curator of mineral sciences at the Natural History Museum of Los Angeles,Geologist Dr. Aaron Celestian, has said on Wednesday ,January 26, that the carbonado diamond is shrouded in mystery as the origin or formation because there's not that many of them found on Earth. It is a very rare one.

Dr. Aaron Celestian says ; "We think that most carbonados are about 2.6 to 3.2 billion years old. That dates back... The Earth is only 4.65 billion years old, so this is dating back closer to major Earth events that were taking place back then, like plate tectonics and oxygenation of the Earth's atmosphere."

It has not been exhibited before and the price is from $4 million and $7 million. However, for someone like Dr. Celestian, the gem is priceless.

"I would love to get my hands on this diamond," he has admitted.

Scientists have been theorizing about the origins of the carbonado diamonds. However, because not enough is known about processes deep within the Earth as well as nebula formations in space, they are at loggerheads.

Celestian has said "We think that they could have formed super deep within the Earth's interior, far deeper than what we know of already diamonds. There's hypotheses that suggest that they formed at impact sites, where a large asteroid hit Earth causing carbon on the surface of the Earth to grow into these carbonados and there's also interstellar hypotheses that suggest that they grew in space and then later fell on the surface of Earth. So we don't know actually where they come from."

He has said research into the diamond would tell us "a lot about what deep Earth interior minerology is like - what is the Earth made of and we just don't know the answers to these questions because we can't sample down that deep. With diamonds like this, this is a rare opportunity for us to see what exactly some of those materials are from the deep Earth interior."

Celestian has also added "Or, if it did come from space, what it would tell us is the evolution of our solar system, information about the evolution of planets in our solar system and that's also quite exciting so no matter what, I think really exciting research could come from these types of stones."

^{PHOTO: VARIOUS OF BLACK DIAMOND; INTERVIEW WITH GEOLOGIST; GRAPHICS AND IMAGES FROM NASA.}