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Types of Pearl

 

Baroque Pearls
Pearls, both natural and cultured, which have an irregular shape.

Black
Greyish, greenish, or brownish-black. Found in the Gulf of California, Mexico. The colour is caused by the content of the sea water. SG 2.61-2.69

Doublet
A cultured blister pearl (Mabe)

Mabe
Cultured blister pearls produced by cementing a small pellet of ‘mother-of-pearl’ to the inside of the molluscs shell. The resulting ‘blister pearl’ is sawn out of the shell and a dome-shaped piece of ‘mother-of-pearl’ is then cemented to its base to cover the area lacking nacre. SG 2.72-2.78

Biwa
Cultured pearls (often oval or baroque in shape) formed on the shored of Lake Biwa in Japan. They are grown in large freshwater mussels by inserting fragments of mantle into the mussel. SG 2.67-2.70

Cyst
This is a pearl that has formed within the pearl mollusc and is spheroid in shape.

Freshwater
These are found in many clams and mussels in rivers and lakes in Canada, Scandinavia and the U.K.

Pink
These are fished off the coast of Florida, the Gulf of California, and Mexico. SG 2.85