Gem Virtuosos: The Drehers and Their Extraordinary Carvings
A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
Artificially Induced Colour in Amethyst-Citrine Quartz
A new and rather unusual gem material and possible treatments are discussed.
The Natural Formation and Occurrence of Green Quartz
How amethyst under certain conditions may turn green rather than the expected citrine-yellow.
"Modern" Jewellery: Retro to Abstract
A review of mid-20th century jewellery styles.