- Gems and Jewelry, 2.2 x 1.6 x 1.0 cm (40 carats)
- Merelani, Arusha, Tanzania
- Ex. Irv Brown
This is a superb thumbnail of a gemmy, lustrous, tanzanite crystal, displaying tri-chroism (three disparate colors: purple, blue, red, each in a different axis or plane) .This is among the finest untreated and naturally colored thumbnails of this species I have seen. The third color is the proof - the treated ones do not have red on the long axis. Also, most natrual ones have not this intense blue color in small sizes. this one, however, does!