Brown, Yellow, Red, Green, Blue, gray, Violet
Reddish, Brown, Red, pink, pink
Uneven, Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Not Available
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references