RARE GEMSTONE: SPHALERITE - 68.81 CT. Balmat, New York This large exotic gemstone is a fancy 'squared-oval' cut with partial checkerboard crown. Rarely facetted, this dark, honey-gold colored material is from an up-state New York Zinc mine. It shows a metallic luster very typical in materials of this high a Refractive Index.
Titanite is a rare collector stone with an unusually high refractive index and and a hardness of 5 Because of its high dispersion and refractive index, a well cut sphene can display stunning brilliance. This gemstone features fire phenomena.
Gem quality sphalerite is a rare collector stone. The mineral is usually nearly black in color but is occasionally found in transparent pieces of an orange or yellowish brown hue. Clean pieces are extremely rare.
The pictured tsavorite, carats, is one of the most valuable gems ever to be discovered in East Africa. In a 925 ct tsavorite crystal was unearthed. The stone was cut to 325 ct, the largest faceted tsavorite in the world.
Paraiba Tourmaline, named after the place it was found. It has appeared in the most amazing colours of neon blue (turquoise), green, blue, mauve and violet. Paraiba Tourmalines are amongst the most fine colours of tourmaline there is.
Orangy Red Tourmaline. Pretty Gem. Fancy Cut. 3.80 ct