This lovely extra long oval cabochon is 82 mm long by 40 mm wide and 5 mmt hick. It is translucent in some spots and dark gray shiny metallic in others! Binghamite comes from the Cuyuna iron range in Minnesota. The stone has areas that are highly chatoyant similar to Pietersite or Tiger's Eye. It is a quartz with fibers of goethite in colors of red, gold, black and there are also rare colors. It was named after Bill Bingham, a lapidarist from St. Paul, who discovered the material on mine dumps of the area in 1936.