The “wing oysters”, genus Pteria, are
characterized by a more elongate shape than
Pinctada spp., being longer (anteroposteriorly)
than wide (dorsoventrally). The posterior ear
is often greatly prolonged (Velayudhan and
Gandhi, 1937). Pearls themselves have always
been objects of great value and have
symbolized love, chastity, purity or feminine
charms in various societies. Good quality
natural pearls are rare and therefore extremely
valuable. The history, distribution and
importance of the pearl as a gem are described
in Kunz and Stevenson (1908), George (1978)
and Ward (1985). George (1978) believed that
W. Saville-Kent produced the first spherical
pearls in the 1890s from P. maxima. Patents
were first filed independently for the procedure
by two Japanese, Dr. Nishikawa and T. Mise
who were believed to have had knowledge of
the techniques of Saville-Kent. The first harvest
in 1976 of 6 kg of pearls was worth US$ 80,000
(US$ 13,333/kg). By 1983, black pearls were
French Polynesia’s top export earner and in
1989 exports to Japan were worth US$ 41.1
million CIF
The “wing oysters”, genus Pteria, are
characterized by a more elongate shape than
Pinctada spp., being longer (anteroposteriorly)
than wide (dorsoventrally). The posterior ear
is often greatly prolonged (Velayudhan and
Gandhi, 1937). Pearls themselves have always
been objects of great value and have
symbolized love, chastity, purity or feminine
charms in various societies. Good quality
natural pearls are rare and therefore extremely
valuable. The history, distribution and
importance of the pearl as a gem are described
in Kunz and Stevenson (1908), George (1978)
and Ward (1985). George (1978) believed that
W. Saville-Kent produced the first spherical
pearls in the 1890s from P. maxima. Patents
were first filed independently for the procedure
by two Japanese, Dr. Nishikawa and T. Mise
who were believed to have had knowledge of
the techniques of Saville-Kent. The first harvest
in 1976 of 6 kg of pearls was worth US$ 80,000
(US$ 13,333/kg). By 1983, black pearls were
French Polynesia’s top export earner and in
1989 exports to Japan were worth US$ 41.1
million CIF
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