You've probably heard that some pearls are natural while others are freshwater pearls or cultured pearls. You've probably also heard that natural pearls are created around a grain of sand. In fact, an oyster usually creates a pearl as a result of something like a parasite or other irritant. Only about one in a hundred oysters naturally create a pearl, and of those, only about one in ten are quality pearls. Cultured pearls are created in the same way - through the introduction of an irritant - but are done so in a controlled environment. As a result, cultured pearls are actually superior in quality to most natural pearls. So, rest assured that cultured pearl jewelry or freshwater pearl jewelry is just as desirable and elegant - if not more so - than natural pearl jewelry.
Grading Pearl Jewelry
Like diamonds, pearls are graded according to the different qualities they possess. Overall, pearls are graded either A, AA, or AAA, with AAA denoting the highest quality. If a pearl falls between the A and AA grades, or the AA and AAA grades, a plus sign (AA+) may also be used.
Pearl Quality
The environment in which pearls are grown affects their quality. A pearl's grade depends upon its luster, shape, and surface appearance. Luster refers to the reflection of light through the outer layers of the pearl. Larger pearls have more layers, and so have greater luster. High luster receives a higher grade than low luster.
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Orignal From: You've probably heard that some pearls
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