GIA's Gübelin Gem Project: Various Gems, Barite - Cuprite
Among the collection assembled by Dr Edward Gübelin are a number of uncommon gemstones from many worldwide localities.
Shenzhen: The Frontier of China’s Gem and Jewellery Industry
All jewellery professionals are familiar with the city of Shenzhen, a global jewellery manufacturing centre and a leader of China’s fast-growing gem and jewellery industry. Join the GIA team as we tour the city and discover more about its leading jewellery brands.
Spring 1991 G&G Lab Notes
This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Russian Flux-Grown Synthetic Alexandrite
Synthetic alexandrite is being flux-grown in Russia.
Gemstones with Alexandrite Effect
The term "alexandrite effect" refers to the apparent change of colour in certain minerals from blue-green or greenish violet in daylight to red or reddish violet in incandescent light.
Chrysoberyl and alexandrite from the pegmatite districts of Minas Gerais, Brazil
Mining fine cat's-eye chrysoberyl and alexandrite in Brazil.