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Fancy Color Diamond
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Fancy Color Diamond Quality Factors

Learn about the factors that make fancy color diamonds so desirable.

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The Wittelsbach Blue

This article describes what is known about the Wittelsbach Blue since it was first reported in 1666, and the gemological information released to date on this diamond.

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Characterization and Grading of Natural-Color Yellow Diamonds

A large number of natural-color yellow diamonds are analyzed using grading and appearance aspects among other characteristics to clarify the differences between them and the light yellow diamonds associated with GIA's D-to-Z color grading scale.

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Characterization and Grading of Natural-Color Pink Diamonds

Known for their great beauty and rarity, pink diamonds have long been sought after by jewelers, collectors, and consumers.

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