Following are the three main groups of cultured
pearls:
1. Freshwater Pearl
: Sizes vary from
2 to 10 mm with color ranging from white, pink, orange,
yellow, grey and pale violet. Generally the shapes are
not round but oval, rice seed or button. China is the
biggest producer of freshwater pearls.
2. Akoya or Japanese
Pearl :
Sizes vary from 2 to 9 mm with colors ranging from white,
pale pink, yellow, gold and blue-grey. The most popular
color is pinkish-white. These are saltwater pearls occurring
in round, oval, pear and baroque shape.
3. South Sea Pearl :
There are two types, black pearls (also called Thailand),
and white-golden south Sea pearls. Sizes vary from 9 to
18 mm with shapes including round, oval, pear, button
and baroque.
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