Red, Violet, Blue, Colorless, Yellow, White, Red, Blue, Colorless, Yellow, White, Red
Red, Brown, Brown, Red, Yellow, pink
Violet, Conchoidal, Brittle, Conchoidal, Brittle
UnevenArthur Thomas, Gemstones (2009) Tough, UnevenArthur Thomas, Gemstones (2009) Tough, Brittle, Uneven