Black Moon Clan
From Wikipedia
Black Moon Clan
The Black Moon Clan or the Legendary Green Emerald is one of the most expensive Gems in the world. It is nearly priceless. It is made up of pure Green Emerald and Gold. It was bought in an underground auction in Hokkaido, Japan by a Mafia leader name Kawamura Hisashimoto. This Gem is given to his only daughter, Sky Hisashimoto, who is destined to be the next leader of the Mafia.
There are no more informations on the whereabouts of his daughter. The Mafias are now searching for her and is destined to be brought back in Hokkaido, Japan this year after being found.
This Gem costs for about $30,000,000,000. This Gem was made a decade ago and was found by the Black Moon Clan.