7 pearl value factors by GIA

Just like diamonds, pearls also have some essential characteristics in order to differentiate high quality pearls from the rest. GIA introduces these seven factors that help evaluate the quality and beauty of a pearl.

Size

In this case size does matter. The size of pearls is measured in millimeters. The bigger the pearl, the better. The pearls that have a bigger size are more precious due to their rarity. There are small pearls, generally around 3-5 centimeters, and big pearls, having more than 9 millimeters. Akoya cultured pearls sold today are between 7 and 7.5 millimeters, Tahitian Pearls are around in 10-12mm and South Sea pearls around 12-15mm.

Shape

The shape if pearls is also different. they can be spherical, symmetrical or baroque. Very few pearls are actually round, they might be near-round, button-round, semi-baroque, baroque, coin, circle and drop pearl. Baroque jewelry is very popular in modern jewelry designs due to its uniqueness.

Color

Cultured pearls present a base color but also an overtone. The overtone is not obvious and it refers to the translucent and radiant color. The third component of a pearl’s color is called orient. It is present if the pearls shows a moving iridescence on the surface. Possible colors are white, pink, silver, cream, black and gold.

Luster

The luster is one of the most appreciated characteristics of a pearl. It represents the intensity of the reflected light, that “inner glow” everyone talks about. An excellent luster truly confers value to the pearl and brings true beauty, appeal. The degrees of luster are: excellent, good and fair.

Surface quality

The surface quality of a pearl refers to degree of irregularities on the surface of the pearl. They are also called imperfections or blemishes like spots, abrasions and bumps. The value of a pearl is higher as blemishes are less visible. Even so it’s very rarely that a pearl has no imperfections.

Nacre quality

A pearl is considered to have a high nacre when the layer of nacre is thicker and thus the luster more full. This characteristic can be observed quite easily. If the pearl is matte that means the nacre is thin and the pearl looks chalky. An intermediate level of nacre quality is when the nucleus is still visible.

Matching

This is an important factor when a jewelers wants to make a uniform strands of pearls. If the easthetic pattern focuses on asymmetry matching is not a problem. Matching means the consistency of all the other factors for more than one pearl.

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