T

Tahitian cultured pearls

produced by a black-lip mollusk (Pinctada margaritifera) in French Polynesia

third graft

cultured pearl grown in an existing pearl sac after the second harvest

third-generation cultured pearl

freshwater or saltwater cultured pearl whose growth is started either by implanting a shell bead nucleus in an existing pearl sac from which a second-generation cultured pearl was removed, or by letting the mollusk grow a beadless cultured pearl in an existing pearl sac from which a second-generation cultured pearl was removed

tissue method

implanting a freshwater host mussel with a donor-mussel mantle-tissue piece to start the growth of a beadless cultured pearl

tissue-cultured pearls

freshwater cultured pearls whose growth is started by implanting a donor-mollusk mantle-tissue piece in a host mollusk’s mantle