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.
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.
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.
Lapis-Lazuli from Sar-E-Sang, Badakhshan, Afghanistan
lapis-lazuli is an ornamental stone (figure 1) that has been found in the artefacts of some of the oldest known civilisations.
Harry Winston: A Story Told in Diamonds
An overview of some of the most fabulous and famous diamonds that Harry Winston has known.
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.
Gemstone Carving in China: Winds of Change
Chinese master carvers have produced some of the world's most sophisticated gemstone carvings.
An Examination of Four Important Gems
Several famous and historical gemstones in the Smithsonian's collection are examined and reported on.
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.
Leigha: The Creation of a Three-Dimensional Intarsia Sculpture
This article illustrates the process of creating a contemporary three-dimensional intarsia sculpture.