Yahoo TV

This mysterious black diamond is going to auction

Location: Beverly Hills, California

The 555.55-carat diamond is called ‘The Enigma’

as its origins are unknown

Some say it's possible the carbonado diamond came from outer space

(SOUNDBITE) (English) CURATOR OF MINERAL SCIENCES AT NATURAL HISTORY MUSEUM OF LOS ANGELES, AARON CELESTIAN, SAYING:"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."

(SOUNDBITE) (English) CURATOR OF MINERAL SCIENCES AT NATURAL HISTORY MUSEUM OF LOS ANGELES, AARON CELESTIAN, SAYING: "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."

Sotheby’s estimates it could fetch up to $7 million

Bids can also be placed using cryptocurrency