•
Bathed pearl (also called Angel, Sheba, Mikomo, Kobe, Nikko, Sumo, Fijii, Aloha, or "improved cultured pearl") is a
mother-of-pearl core coated with a mixture of plastic
enamel,
lead carbonate,
mica, and
titanium dioxide, then with a film of iridescent nylon. •
Bohemian pearl is a cut and buffed mother-of-pearl protuberance. •
Cotton pearl (also called "Utter Ethical pearl") is made merely from cotton and mica. •
Glass pearl is a glass bead dipped or sprayed with pearlescent material, or hollow glass bead filled with pearlescent material. One variation is the
Majorica pearl. Wax-filled pearl simulants are hollow glass beads coated with ''essence d'orient ''and filled with wax. Variations of these wax-filled simulants, which are produced in slightly different manners, include Parisian pearls, Paris pearls, French pearls, Bourguignon pearls, and Venetian pearls. •
Mother-of-pearl pearl is crushed
nacreous shell powder,
sintered into the desired shape. See also shell pearl (1) below. •
Plastic pearl has plastic core coated with a pearlescent material. •
Roman pearl is an alabaster core coated with a pearlescent material. •
Shell pearl • Cut, buffed, and sometimes dyed nacreous portions of mollusk shells: Variations and alternate names include cat's-eye pearl,
coque de perle (from nautilus shells), mother-of-pearl pearl (from mother-of-pearl), and hinge pearl (from the hinge of bivalve shells). • Spherical shell core coated with pearlescent material The pearlescent substance used to coat various cores may contain ''essence d'orient'',
isinglass, fish scales, oyster scales, or mother-of-pearl powder, along with binders or dyes.
Coral is sometimes used to imitate pearls from the
pink conch, and
hematite is sometimes used to imitate black pearls. ==See also==