Dims: 0.4" x 0.3" x 0.2"(1.0 x 0.8 x 0.5 cm)
Wt: 3.80 ct
Figuring out where this specimen came from was not very difficult, as it consists of a single crystal of Tanzanite, a blue variety of the mineral Zoisite. The crystal has a rather well-defined form, but is incomplete due to the fact that it grew at an angle to another crystal from which it was separated. Its pleochroism is obvious- it appears to be a nearly colorless beige when viewed through its largest prism faces, whereas it has a lovely, violet-blue coloration when viewed through its smaller prism faces, and appears nearly brown in color when viewed down through its termination. It shows no man-induced damage, but there are a few heavy cracks running through it. Its luster is vitreous and it is transparent and clear, although internal fractures mar the clarity and prevent it from being viable gem material. I saw only 3 Tanzanite crystals in all the Tucson shows that were larger than this one, and they all exceeded $300 in price- and that was dealer's price! Its value, even in rough form, is amazing!