Orient is the quality in a pearl in which rainbow-like colors appear to flow across a pearl's surface. This is a rarely seen attribute in pearls and occurs in only a few of the most spherical pearls.


Sea of Cortez Pearls, Mabes and Keshi from the “Rainbow Lipped Pearl Oyster” Pteria Sterna Exhibiting Orient.
Photo Courtesy of The Sea of Cortez Pearl Blog.