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Emerald Description - GIA Emerald is the green to bluish green variety of beryl, a mineral species that also includes aquamarine as well as beryls in other colors Gem experts differ on the degree of green that makes one stone an emerald and another stone a less-expensive green beryl
The Lennix Synthetic Emerald - GIA The Lennix synthetic emerald, currently n~anufactured in France, is a dark green, moderately transparent to translucent material grown by flux fusion With the microscope, zones of lighter and darker green are evident
A New Discovery of Emeralds from Ethiopia | Gems Gemology Otherwise, the gemological properties were very consistent with emeralds, including an average specific gravity of 2 73 and a refractive index of 1 581–1 589 These emeralds were generally inert to long- and short-wave UV exposure due to their moderately high iron content, which is typical of schist-hosted emeralds
RUSSIAN FLUX-GROWN SYNTHETIC EMERALDS In addition, this article describes the gemological properties of the ~ussianflux-grown syn- thetic emerald and identifies the key characteristics by which it can be distinguished from natural emeralds using routine gemological tests
Characterization of Chinese Hydrothermal Synthetic Emerald In addition, spectroscopic properties in the mid- and near-infrared are useful to characterize this new Chinese product; features in the 2500–3100 cm -1 range (also found in other chlorine-bearing synthetic emeralds) help distinguish it from natural emeralds
Amethyst Gemstone | Amethyst Stone - GIA Amethyst was as expensive as ruby and emerald until the 19th Century, when Brazil’s large deposits were discovered It was believed to prevent intoxication—amethystos means “not drunk” in ancient Greek
Quartz - Citrine - GIA Zimbabwe, Mashonaland West Province (Karoi District), Karoi Description Gemological Properties Shape: Emerald Weight: 11 11 ct Dimensions: 15 73 x 11 00 x 8 93 mm Diaphaneity: Transparent
Winter 1992 Gems Gemology - GIA Emerald, aquamarine, and morganite are certainly more salable names than green beryl, blue beryl, and peach beryl This also explains the trade's desire to use the term tan- zanite instead of the scientifically acceptable zoisite
Jadeite Jade Quality Factors - GIA The finest-quality jadeite—almost transparent with a vibrant emerald-green color—is known as “Imperial jade ” The royal court of China once had a standing order for all available material of this kind, and it’s one of the world’s most expensive gems