Super-huge half-free pearl and culture method thereof

The invention relates to an oversize half-free pearl and a culture method thereof. The breeding method comprises the following steps: manufacturing a half-edge-shaped pearl nucleus with the diameter of 18-30 mm; according to the diameter and the weight of the pearl nucleus, selecting a pearl breeding parent body with a corresponding nucleus implanting position and size and selecting different nucleus implanting and pearl breeding modes; when the selected pearl nucleus is a light pearl nucleus with small material specific gravity, the pearl nucleus can be planted in a first operation or a second operation for pearl cultivation; when the selected pearl nucleus is a heavy pearl nucleus with a large material specific gravity, nucleus implantation and pearl culture are required to be performed twice; in the first operation, a pearl bag is firstly cultured, then pearl nucleuses are implanted into the pearl bag for breeding and pearl breeding, and oversize half free pearls with the pearl nucleuses wrapped by nacre l