This stone gets its name from the Greek, words "tria," three, plus "phylon," family, because it was thought to contain three cations (Fe, Li, Mg). There have been crystals of Triphylite found in South Dakota up to 6 feet long!! Most of those crystals are opaque and wouldn't be well suited for cutting gems. Brazil is one of the few places that produces gem quality Triphylite and this stone is a a very good size gem for the material. It is very very slightly included and has a very pleasing almost dichroic appearance as it looks somewhat greenish grey one direction, but shows hints of a brownish orange in another direction. It reminds me of Axinite stones that I have seen from Baha. The stone has an Emerald cut, and would make a great addition to any rare stone collection. Enjoy.