White, Colorless, Blue, Red, Green, Yellow, Violet
Colorless, White, Blue, Yellow, Grey, Brown, Colorless, White, Blue, Yellow, Grey, Brown
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Irregular/uneven