Loose Diamond :
The world's most expensive diamond (and most expensive gem ever sold at auction): The Blue Moon Diamond sold for $48 million. At 12.03 carats, that's $4 million per carat!
The world's most expensive diamond (and most expensive gem ever sold at auction): The Blue Moon Diamond sold for $48 million. At 12.03 carats, that's $4 million per carat!
