Italy, India, USA, Canada
Brazil
White, Colorless, Green, Yellow, Brown, Brown, Colorless, Yellow, White, Green
White, Blue, Yellow, Brown, Green, Brownish, Greenish, gray
Brittle, Uneven, Brittle, Uneven
Gemstones (2009), Flexible Flexible fragments.
NaCa16Si23AlO60(OH)8•64(H2O)
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references