tahitian pearl necklace

However, almost all pearls jewelry used for jewelry are cultured by planting a core or nucleus into pearl oysters. The pearls are usually harvested after one year for Akoya, and 2-4 years for Tahitian and South Sea, and 2-7 years for freshwater pearl beads. This mariculture process was first developed by Tatsuhei Mise and Tokichi Nishikawa in Japan. The nucleus is generally a polished bead made from freshwater mussel shell. Along with a small piece of mantle tissue from another mollusk to serve as a catalyst for the pearl sac, it is surgically implanted into the gonad (reproductive organ)... (read more)