Luster refers to how light reflects off the surface of a pearl. High-quality pearls have a bright, sharp glow with depth, giving them a lively and radiant appearance. Strong luster is often the first thing people notice and is one of the most important indicators of pearl quality.

Surface quality describes the natural markings found on a pearl, such as small spots, lines, or indentations. Because pearls are formed organically, minor imperfections are normal and can add character. Fewer and less noticeable blemishes generally indicate a higher-quality pearl.

Shape refers to how round or symmetrical a pearl appears. Perfectly round pearls are rare and highly valued, while slightly off-round or organic shapes can feel more natural and unique. The shape influences both the pearl’s elegance and its overall character.