Crystals grown on a slide and shot between crossed polarizing filters. None of this colour is pigment — the crystal splits the light in two, the halves fall out of step, and whatever survives when they recombine is what you see.
Crystals grown on a slide and shot between crossed polarizing filters. None of this colour is pigment — the crystal splits the light in two, the halves fall out of step, and whatever survives when they recombine is what you see.