The excellent and cost of pearl jewelry are determined by numerous elements: luster, floor high-quality, form, length, coloration, and nacre thickness. Luster, the reflective great of the pearl, is crucial for its brilliance. floor exceptional refers to the presence of blemishes or imperfections. shape can range from flawlessly round to baroque (irregular), with round being maximum valued. larger pearls are normally greater treasured. color varies broadly, with white, black, and crimson being not unusual, and uncommon shades fetching better prices. Nacre thickness influences durability and look, with thicker nacre resulting in higher high-quality pearls.