... , oval, off-round, tear-drop, button, flat pearl, baroque pearl, keshi pearl, biwa pearl; flower-shape pearl and so on.3. Customized designs and specifications ... quantities.)Grade standard gradeLuster surfaceNacreAAAsuperb lustermore than 95% freevery thickAAgood luster90%-95% freethickAaverage luster75%-90% freemediumBnot so good luster60%-75% freeacceptable ( function(){ var aBigImageSrc ...