Hanadama pearl is the best possible quality of Akoya pearl. Hanadama pearls are generally considered as close to perfect in each of quality attributes such as luster, nacre thickness, color, overtones, roundness, surface.  Only approximately 1% of marketable Akoya pearl qualifies for Hanadama pearl.  All Hanadama pearls are evaluated and certified by the Pearl Science Laboratory in Tokyo and should be accompanied with an identifying certificate.  Because of scarcity of Hanadama  pearls,  they command a substantial premium in price.