Dims: 5.21x3.43x1.73" (13.24x8.72x4.40cm)
Wt: 13.0oz (368g)
This moissanite specimen is a typical cluster of silicon carbide crystals that precipitated on the walls of a blast furnace during the manufacture of steel. As such, it has a black color (due to a high level of iron impurities) and the crystals are opaque. They do have an excellent vitreous luster, and a colorful irridescent tarnish. The larger crystals are well formed thin hexagonal blades, while about half of the surface is covered by smaller distorted crystals that are often curved.