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Organic
Once living, or produced by a living organism (plant or animal). Organic gems include pearls, amber, jet, ivory and coral.
Orient
Orient is a rare and beautiful optical effect found in some pearls. Orient is like the shifting rainbow colors you see in soap bubbles. These rainbow hues shimmer across the pearl when light hits the surface and breaks into different colors.
Overtone
Overtone is secondary to
body color
and is one or more subtle, translucent colors that lie across a pearl’s surface. Some pearls display no overtone and others display one or more such as green, blue or
rosé
.
Oval-shaped
A brilliant-cut fancy shaped oval diamond.