Musgravit - $ 6,000 per carat
It is a rare mineral from the taaffeite group, a complex oxide of magnesium, beryllium, etc., of the trigonal system. The name Musgravit refers to its original location in Australia, in the Musgrave Range. The stone has light olive green, gray, mauve, gray-purple. Musgravite was originally discovered in 1967.