RVB LAB Crystal Highlighter Fluid Illuminator 315 The Crystal Highlighter 315 by RVB LAB is a fluid highlighter designed to give a subtle shine to the skin, enhancing strategic points such as cheekbones, lips, brow bones, and eyelids. Benefits: Luminous drops that even out and illuminate without weighing down the skin. The texture is fluid, delicate, and easy to integrate with makeup. It can be used alone on highlights or mixed with foundation for a radiant effect