9.5x10mm AAA Quality Black Bodycolor Japanese Akoya cultured pearl necklace 51" triple strand Rope - White Gold Claspbr Black Japanese Akoya Cultured Pearls are very popular and usually only found in the finest jewelry stores within Japan. Known for their steel-like sharp reflections, these pearls have a truly mystical look where the pearls capture the light and delivers it back in a mysterious incandescent glow.