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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 gemmological information released to date on this diamond.

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An Important Exhibition of Seven Rare Gem Diamonds

The stories behind seven strikingly beautiful rare natural diamonds, united in an exhibit at the Smithsonian, are told here.

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Star of the South: A Historic 128 Ct Diamond

This article presents the first complete gemmological characterisation of the historic 128.48 ct Brazilian diamond known as the Star of the South.

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Fingerprinting of Two Diamonds Cut from the Same Rough

With the information from a combination of tools now available, the sophisticated gemmologist can fingerprint a given stone.

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Raman Investigations on Two Historical Objects from Basel Cathedral: The Reliquary Cross and Dorothy Monstrance

Two ecclesiastical objects of the late Gothic period (1350–1520) were investigated to identify the gemstones that adorn them.

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Leigha: The Creation of a Three-Dimensional Intarsia Sculpture

This article illustrates the process of creating a contemporary three-dimensional intarsia sculpture.

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Emerald and gold treasures of the Spanish galleon Nuestra Señora de Atocha

During the 1970s and 1980s, treasure hunters discovered the centuries-old remains of the sunken Spanish galleons Nuestra Señora de Atocha and Santa Margarita.

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An Examination of Four Important Gems

Several famous and historical gemstones in the Smithsonian's collection are examined and reported on.

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Gemstone Carving in China: Winds of Change

Chinese master carvers have produced some of the world's most sophisticated gemstone carvings.

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The Pearl in the Chicken: Pearl Recipes in Papyrus Holmiensis

Several pearl-in-chicken cleaning experiments are carried out to test the validity of recipes from an ancient Egyptian source.

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