Material properties of diamond these are known as ballas and are important to industry as they lack the cleavage planes of single-crystal diamond. Carbonado is a similar opaque microcrystalline form which occurs in shapeless masses. Like ballas diamond, carbonado lacks cleavage planes and its specific gravity varies widely from 2.9 to 3.5. Bort diamonds, found in Brazil, Venezuela, and Guyana, are the most common type of industrial-grade diamond. They are also polycrystalline and often poorly crystallized; they are translucent and cleave easily. Because of its great hardness and strong molecular bonding, a cut diamond's facets and facet edges appear the flattest and sharpest. A
Carbonado, Washington its possession. The time that Carbonado did spend as a coal mining town is forever kept by the cemetery, abandoned mines, a grown-over coal slag pile, a school, and the company houses left behind. The cemetery holds the memories of older and more recent dead with many of the graveholders family still living nearby. Huge concrete monoliths that once held that cables for the mining carts, point straight towards the old mine shafts and openings and stand overgrown and utilized now only by the town's children. One hill in town started out as the coal slag pile and now has