beautiful unusual gray-black crystal stone cassiterite with a metallic sheen standing in the glass stand. stock footage

amethyst artificial atomic background black boron cassiterite chemical chemistry crystal development discoloration edge faces force fracture geology gray group laboratory magnification metal microcosm microinclusions microscope mineral mottled natural ore organization pearlescent periodic prism probe science semiconductor shine space stone symmetry system tertogonalnaya tin treatment trigonal units vanadium variety view