The iridescent effect visible in finer quality pearls; also called overtone.
Refers to a pearl's iridescence.
The shimmering, iridescent play-of-colour seen on or just below the surface of the pearl.
the rainbow effect that seems to encircle a pearl's surface.
Minute prismatic sheen on or just below the surface of a pearl or cultured pearl caused by the interference and diffraction of light from the minute crystals comprising the nacre.
The iridescent play-of-color that gives pearls their deep inner glow.
The peculiar lustre of a top quality pearl.
The iridescent luster of a pearl.
The iridescent, rainbow effect that some pearls display.
This is a prismatic effect that is created in pearls with thick, high quality nacre.
The layers of nacre that form a pearl contain tiny light-reflecting crystal. When there enough layers of crystals and they align in a certain way, the reflected light will form a prismatic effect on the surface of the pearl. The beautiful rainbow-like effect is known as “orient.