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.
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.
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.
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.
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.
Leigha: The Creation of a Three-Dimensional Intarsia Sculpture
This article illustrates the process of creating a contemporary three-dimensional intarsia sculpture.
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.
An Examination of Four Important Gems
Several famous and historical gemstones in the Smithsonian's collection are examined and reported on.
Gemstone Carving in China: Winds of Change
Chinese master carvers have produced some of the world's most sophisticated gemstone carvings.
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.