7 Commercial Quality Near-round to Off-round; Moderate/Low Luster; Thin Nacre (less than .2 of total nacre); Moderate to Heavy Inclusions; Good to Moderate Matching.
7 Commercial Quality Near-round to Off-round; Moderate/Low Luster; Thin Nacre (less than .2 of total nacre); Moderate to Heavy Inclusions; Good to Moderate Matching.
7经济级的质量，接近圆到不圆，中/低光泽，簿的珠层（小于0.2的珠层含量），中等到大量的瑕疵，良好到中等的匹配。