N

nacre

ragonite and calcite platelets bound together by conchilion that completely compose bivalve and abalone natural pearls, keshi, tissue-cultured freshwater pearls, and the coating on the nucleus of bead-cultured and bead-and-tissue-cultured pearls.

nacre thickness

measured in whole and decimal fractions of millimeters, the depth of the nacre layer on the bead nucleus of bead-cultured and bead-and-tissue-cultured pearls

nacreous

composed of nacre

Nassau pearl

historical term for conch pearl

natural pearls

organic gems created in a mollusk without human intervention

nautilus pearls

natural pearls from Nautilus pompilius which are extremely rare

non-beaded cultured pearls

cultured pearls grown without a bead nucleus

non-nacreous pearls

natural pearls lacking a nacreous surface layer

non-nucleated cultured pearls

cultured pearls grown without a bead nucleus

nucleus

bead implanted in a host mollusk, most often with a tissue piece, to become the core of a cultured pearl