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Amber
Amber is nature’s time capsule. This fossilized tree resin contains remnants of life on earth millions of years ago.
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The Capão Topaz Deposit, Ouro Preto, Minas Gerais, Brazil
This article examines the history of the Ouro Preto district as well as the geology of the area and occurrence of the topaz.
Sri Lanka: The Gem Island
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
Research Publication Archive
GIA's Gübelin Gem Project: Various Gems, Taaffeite - Zoisite
Edward Gübelin博士によって集められたコレクションの中には、世界中の産地からの珍しい宝石が多数あります。
Thermal Alteration of Inclusions in "Rutilated" Topaz
Faceted colorless topaz containing acicular inclusions has been offered for sale as
Polished Freeform Topaz Imitating Diamond Rough
Material submitted as a rough diamond is revealed through gemological testing and analysis to be a near-colorless topaz.
Sphalerite in Topaz
Topaz Care and Cleaning Guide
Learn about topaz's durability and how to care for your topaz jewelry.
Topaz Description
Topaz actually has an exceptionally wide color range that, besides brown, includes various tones and saturations of blue, green, yellow, orange, red, pink, and purple. Colorless topaz is plentiful, and is often treated to give it a blue color
Topaz History and Lore
Most authorities agree that the name topaz comes from Topazios, the old Greek name for a small island in the Red Sea, now called Zabargad. (The island never produced topaz, but it was once a source of peridot, which was confused with topaz before the development of modern mineralogy.)
