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A Brief History of Pearls: Tahitian Pearl Quality Evaluation

The short answer

Tahitian pearls are graded on color, luster, size, surface, shape and nacre thickness. Large, round pearls are worth the most, and the finest show a vivid overtone and shimmering orient. Round Tahitian pearls are the hardest to culture.

Reviewed by American Pearl’s pearl specialists · Updated October 2026
  A brief history of pearls

TAHITIAN PEARL EVALUATION


The evaluation of Tahitian pearls is a rigorous process. It involves sorting pearls by shape, size, luster and color, and once they're separated into these broad categories, they're further classified.


Evaluating Quality of Tahitian Pearls

Like all other pearls, exotic Tahitian pearls are judged on several factors, including:


The most beautiful Tahitian pearls typically increase in value, making them a good investment for savvy consumers.

Naturally, large and round pearls have a higher value than smaller pearls with irregular shapes. With all other factors being equal, the larger the pearl, the more valuable it is. Round pearls are the most difficult to culture.

Some Tahitian pearls - particularly the colored varieties - produce a luminescence and color intensity that you won't find in other pearls. In some cases, they're incredibly vibrant. The most costly and valuable Tahitian pearls have a breathtaking overtone and a shimmering orient, which is the iridescent color on or just below the pearl's surface.

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Gift Giving Occasions


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Tahitian pearl quality: common questions

How are Tahitian pearls graded?

On color, luster, size, surface quality, shape and nacre thickness, after being sorted into broad categories and then finer grades.

What makes a Tahitian pearl valuable?

Size, a round shape, strong luster and a clean surface, plus an intense overtone and orient. With other factors equal, larger is worth more.

What is the rarest Tahitian pearl shape?

Round. It is the most difficult shape to culture.

Shop Tahitian pearls

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Still deciding? Speak with a pearl specialist at 1-800-847-3275, or browse all Pearl Answers.

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