Colorless, White, gray, Brownish, Greenish
Colorless, White, Yellow, White, Greenish, gray, Brown, Colorless, Yellow
KAl 2AlSi 3O 10(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references