Geology of GemsThese factors, particularly the hardness of a mineral and its tendency to split along cleavage . The Cubic or Isometric System include all crystal shapes that have symmetry axes in .. Metallic means having the appearance of polished metal.cube shaped metal ore,Here is how metal-eating bacteria may make asteroid mining .Jan 29, 2015 . Here is how metal-eating bacteria may make asteroid mining profitable . carry a dozen small cube-shaped spaceships (CubeSats), which will inject . of ores and mine waste that provide an alternative supply of metals such.
cube shaped metal ore