"the great black pearl that hung from Hira Lal's ear glimmered"


Black pearl oyster
Creative Commons Attribution Share AlikeBlack pearl oyster

Black pearls are a highly valuable type of pearl.  In the past they were very rare, as the black pearl oyster, Pinctada margaritifera, didn't usually produce any natural pearls - today, however, pearl culture technology can be used to create black pearls.