4 A/A+ Round to Near-round; Moderate Luster; Medium/Thin Nacre (.2-.3 of total nacre or better); 70% Inclusion Free Surface; Good Matching.
4 A/A+ Round to Near-round; Moderate Luster; Medium/Thin Nacre (.2-.3 of total nacre or better); 70% Inclusion Free Surface; Good Matching.
圆到接近圆的程度，中等光泽，中/簿的珠层(0.2-0.3或以上的珠层含量)，70%的表皮光洁度，良好的匹配。