Exceptional brilliance and fire, typical of high-refractive-index crystals.
Lacking any significant gloss or reflectivity.
Smooth, highly reflective surface resembling glass.
Surface appearing oily or greasy to the touch or eye.
High reflectivity characteristic of polished metal surfaces.
Iridescent, multi-layered reflection resembling mother-of-pearl.
Appearance similar to resin or amber.
Parallel fibrous structure reflecting light like silk.
Dull, matte surface resembling wax.
The quality and intensity of light reflected from the surface of a material.