While there is no standardized grading system for pearl quality there are a number of factors that help determine the value of a pearl including pearl type size shape color nacre quality and luster plus its rarity and weight for natural pearls or size for cultured pearls.
What are good quality pearls.
Look for knots that are all similar in shape and fit tightly against each side of the pearls.
The value of a pearl varies widely.
You should be able to see your reflection clearly on the surface of a pearl.
When other value factors are equal larger pearls are rarer and more valuable than smaller pearls of the same type.
For this reason cultured pearls are graded to help gem customers understand the features of their pearls.
The cleaner the surface of the pearl the more valuable it is.
Best quality pearls are determined by luster nacre thickness and quality the outer layer color surface perfection shape and size.
Every type has both high and low pearl examples when it comes to quality.
The luster of good quality pearls is sharp and bright.
Look for an absence of disfiguring spots bumps or cracks on the.
The qualities that determine the overall value of a natural or cultured pearl or a piece of pearl jewelry are size shape color luster surface quality nacre quality and for jewelry with two or more pearls matching.
Any pearl that appears too white dull or chalky is of low quality.