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![Review of Gempedia: A Comprehensive Glossary for Gemstones and Gemmology, by Rui Galopim de Carvalho Review of Gempedia: A Comprehensive Glossary for Gemstones and Gemmology, by Rui Galopim de Carvalho](https://www.gia.edu/images/shigley-gempedia-300px.jpg)
Book Review: Gempedia: A Comprehensive Glossary for Gemstones and Gemmology
Review of Gempedia: A Comprehensive Glossary for Gemstones and Gemmology by Rui Galopim de Carvalho.
Read More![1.23 ct, unheated rough from Ilakaka, Madagascar 1.23 ct, unheated rough from Ilakaka, Madagascar](https://www.gia.edu/images/Shen-nano-inclusions-natural-sapphire-Fig3a-300px.jpg)
The Nature of the Be-Nb-Ta Containing Cloud in Natural Madagascar Blue Sapphire – An FIB/HRTEM Study
Investigates the nature of nano-inclusions of elements such as niobium, tantalum, and tungsten in the milky regions of natural beryllium-bearing sapphires.
Read More![Gems & Gemology Spring 2024 In Brief Gems & Gemology Spring 2024 In Brief](https://www.gia.edu/images/SP24-In-brief-324095-300x221px.jpg)
![Figure 1. A fine 925 ct crystal that was formerly displayed in the Texas State Capitol and sat on the governor’s desk in 1969 when the legislature adopted blue Texas topaz as the state gem. This specimen was found in 1904 and now resides in the Hamman Gem and Mineral Gallery in the Department of Earth and Planetary Sciences at the University of Texas at Austin (catalog no. B0344). Photo by Blanca Espinoza. Figure 1. A fine 925 ct crystal that was formerly displayed in the Texas State Capitol and sat on the governor’s desk in 1969 when the legislature adopted blue Texas topaz as the state gem. This specimen was found in 1904 and now resides in the Hamman Gem and Mineral Gallery in the Department of Earth and Planetary Sciences at the University of Texas at Austin (catalog no. B0344). Photo by Blanca Espinoza.](https://www.gia.edu/images/WN23-Bassoo-Fig1-option3-314913-300px.jpg)
G&G Features in a Flash: Texas Topaz
Learn about Texas topaz history and geographic origin research.
Read More![Figure 1. This 2.20 ct Fancy Deep brownish orange treated HPHT-grown diamond owes its distinctive appearance to multiple defect concentrations created within the various growth sectors. Photo by Diego Sanchez. Figure 1. This 2.20 ct Fancy Deep brownish orange treated HPHT-grown diamond owes its distinctive appearance to multiple defect concentrations created within the various growth sectors. Photo by Diego Sanchez.](https://www.gia.edu/images/WN23-LN-Fig8-315004-300px.jpg)
New and Notable Finds from the GIA Lab: Winter 2023
Discover a bicolor chameleon diamond, a diamond with carbon dioxide, and a pink square inside a diamond.
Read More![Sun setting over water in Northern Madagascar Sun setting over water in Northern Madagascar](https://www.gia.edu/images/gems-northern-madagascar-300x169.jpg)
Gems of Northern Madagascar Video with GIA Field Gemology
Madagascar, a gemstone wonder, is explored by GIA's Field Gemology Manager, Wim Vertriest. He retraces the island's gemstone history and shares experiences from a recent expedition to two remote mines in Northern Madagascar: a demantoid and a sapphire mine.
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