FIELD: production of cultivated pearl. SUBSTANCE: the mantle cavity of bivalvular mollusks is introduced with a core seeding as asymmetric carbonate crystals. The latters are obtained due to crystallization of nutritive medium which represents extrapallial liquid from mollusk's mantle layer. Nutritive medium is put into capillary tube which provides directed movement of crystallization reaction components. EFFECT: higher efficiency to obtain cultivated pearl with properties close to those in natural pearl.
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