Colorless, White, Blue, Yellow, Grey, Brown, Colorless, White, Blue, Yellow, Grey, Brown
Yellow, Brown, Red, White, Green, Reddish, Black
Irregular/uneven
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
{0001}, {11 2 0} imperfect