Color Analysis of Iron Oxide Blue

Iron oxide blue is a pigment with mysterious color in the iron oxide family. Its blue is different from the blue of the sky and the blue of the sea. It is a color with fascinating superpowers. Blue is one of the three primary colors, and its wavelength Z is as short as 450 to 500 nm, which is a short wavelength. Blue is, because of its mysterious color, has far-reaching significance.

Iron oxide blue is mainly used for making lacquer, ink, painting, pigment and crayon, painting varnished cloth, lacquer paper, plastic products coloring, building floor, floor tiles and other coloring.

The single crystal form of perfect blue iron oxide is octahedron or rhombic dodecahedron. When it is rhombic dodecahedron, there are often stripes parallel to the long diagonal direction of the crystal plane on the rhombic surface. Ferric oxide blue body is dense block or granular. The color is iron black, with black streaks, semi-metallic luster, opaque, no cleavage, Mohs hardness 5.5-6, specific gravity 4.8-5.3. It has strong magnetism and is the strongest among minerals and can be attracted by magnets.

The main component of iron oxide blue is magnetite, the chemical composition of magnetite is Fe3O4, and the crystal is an oxide mineral of equiaxed crystal system. Because iron oxide blue is magnetic, it is also called iron oxide blue in ancient China as ci stone, magnet, and mysterious stone.