Colorless, White, Yellow, Green, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet
Colorless, Greenish, Colorless, Green, gray, Yellow
Uneven, Brittle, Uneven, Brittle, Uneven
Irregular/uneven, Uneven
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references