Thin Film Interference

Discussion

iridescence, opalescence, pearlescence

pigeon neck feathers gasoline on water scorched steel cookware
droplets on tea droplets in clouds droplets in clouds
butterfly wings mussel shells opals

color shifting ink, chromoskedaisic? chenmoskedaisic? colors produced without dyes

structural coloration — the interaction of light with features to produce color rather than pigmentation

mother of pearl — cystals of aragonite