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Pinctada maxima
''Pinctada maxima'' is a species of pearl oyster, a marine bivalve mollusk in the family Pteriidae, the pearl oysters. There are two different color varieties: the White-lipped oyster and the Gold-lipped oyster.
These bivalves are the largest pearl oysters in the world. They have a very strong inner shell layer composed of nacre, also known as "mother of pearl". They are important in the cultured pearl industry as they are used to produce South Sea pearls.
Known also as the South Sea Pearl or Philippine Pearl, it was declared by Philippine President Fidel Ramos as the national gem in 1996 through Proclamation No. 905. This is also featured at the reverse side of the PHP 1000 bill.
==Distribution==
This species occurs in Australia, Fiji, Tahiti, Indonesia and the Philippines.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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