Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Benmoreite Uses. We have provided you with all information about Benmoreite rock here. An iron rich extrusive rock found as a member of the alkali basalt magma series. Benmoreite is available in black, brown, light to dark grey colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Benmoreite is black. Get to know more about Benmoreite rock and characteristics of Benmoreite rock in the next sections.