Luster
Luster is the primary criterion for evaluating pearls. It resembles a glow radiating from within, casting a mysterious allure over the pearl and infusing it with captivating vitality. For cultured pearls, luster is a definitive indicator of quality, as a stunning radiance can only be achieved through the accumulation of multiple layers of nacre.
Color
The choice of pearl color is a matter of personal taste. While certain hues-such as pink, silvery-white, and pale gold-command higher market value due to their rarity or popularity, color is not fundamentally critical to assessing a pearl's quality.
Shape
Generally, the ideal pearl shape is perfectly round or an elegant teardrop; however, shape preference is subjective. Pearl evaluation focuses primarily on quality rather than perfect symmetry.
Surface
In principle, the fewer pits or blemishes on the surface, the higher the pearl's value. Yet, even highly valuable pearls often exhibit minor surface imperfections, making truly flawless pearls exceptionally rare.
Size
Generally, the larger the pearl, though there are exceptions for certain baroque (irregularly shaped) pearls. Like shape, size is not the primary factor in determining quality; the choice of size should complement the wearer's physique and facial features. Therefore, when assessing a pearl's quality, one should prioritize luster over size.
