Mikimoto tassel drop necklace with a white 8 mm pearl, 10 mm black pearl and diamond set drops. This exquisite piece is made with 18 ct white gold and has a longer chain 35". Diamonds 0.07ct. Over a century ago, Kokichi Mikimoto succeeded in creating the world's first cultured pearl. His quest for perfection and his love for these pure, lustrous gems of the sea were the guiding forces that built the house of Mikimoto.