Dims: 0.4 x 0.3 x 0.3" (1.0 x 0.8 x 0.8 cm)
Wt: 0.83 g
A single untreated Tanzanite crystal comprises this small thumbnail specimen. It is in excellent condition, showing only a small amount of fresh damage near its termination. Its orthorhombic prismatic form is very good, with generally well-defined edges and striated but clean faces that possess the standard vitreous luster. Its pleochorism is obvious, as its color is a pale blue when viewed through either of its two largest prism faces, but is much more violet in coloration when viewed through any of its smaller prism faces. It also shows a pale brown color when viewed from either its top or through its base; ergo, it has not undergone heat-treating. A few very minor internal fractures run along the lower portions of its main prism faces, but the crystal appears to be flawless, otherwise. Like all of our Tanzanite specimens, there is no host rock present. One could conceivably cut a stone from this piece, but it would not have uniform coloration without heat-treatment.