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Official GIA Channel
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The world's foremost authority in gemology.
The world's foremost authority in gemology.

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If you’re looking to recruit top talent in the gem and jewelry industry, GIA Jewelry Career Fair in New York on March 8 is the place to be! Click here: http://bit.ly/2ErYDXy to register.
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If you had to pick one December birthstone, which would it be: tanzanite, turquoise or zircon? From the blue to bluish purple of tanzanite, to the intense blue and green of turquoise, to the rainbow varieties of zircon – there’s a color for everyone. http://bit.ly/2QQoMVI
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If you’re celebrating a December birthday, you’re lucky you have a trio of birthstones – turquoise, tanzanite and zircon. See GIA's birthstone exhibit celebrating every month at San Diego Natural History Museum's "Hidden Gems" exhibit in Balboa Park. http://bit.ly/2ABum4c Photo: Orasa Weldon/GIA. Courtesy: Dr. Edward J. Gübelin Collection
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Celebrate the holidays with red gemstones! This diamond is the Moussaieff Red, a Fancy red diamond that weighs 5.11 carats. Not only is it beautiful, it is also incredibly rare. http://bit.ly/2RsjH3c Photo: Shane F. McClure/GIA
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Some believe topaz, the November birthstone, comes from the Sanskrit word tapas, which means “fire.” Others trace it back to the Greek topazos. Learn more birthstone history and lore here: http://bit.ly/2DElm2a Photo: Robert Weldon/GIA. Courtesy: Edward Boehm, RareSource
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An exceptionally large and clean 1.91 ct faceted oval brilliant afghanite was recently submitted to GIA in Carlsbad. Named in 1968 after its discovery in Badakhshan Province, Afghanistan, it is often found in association with lapis lazuli and sodalite. To date, it's the largest facet-grade afghanite on record in the GIA gem identification department. Read the full lab note in the Summer 2018 issue of Gems & Gemology. http://bit.ly/2zcLTQt
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Happy Thanksgiving! You may be thinking of pumpkin pie today, but we have our eyes set on this 5.54 carat Fancy Vivid orange diamond graded by GIA. In what piece of jewelry would you wear this color diamond? Photo: Shane McClure/GIA
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Fire agate is a variety of chalcedony, a micro or cryptocrystalline quartz. With its swirling flares of orange iridescence and flashing streaks of brown, yellow and green, it is aptly named. It forms in botryoidal structure, resembling a cluster of grapes. Fire agate is an excellent example of the iridescence phenomenon seen in chalcedony. Photo: Robert Weldon/GIA. Courtesy: Commerical Mineral Company, Inc.
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Minas Gerais, a state in Brazil, is one of the most important sources for high-quality topaz, which has been mined there for more than two centuries. Yellow to orange, red, pink, violet and blends of red with orange or purple are some of the colors unearthed here. Learn more about one of the November birthstones. http://bit.ly/2zWAFz9: Orasa Weldon/GIA
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Nature gives us a brilliant palette of color-changing leaves and a spectacular kaleidoscope of sunsets during the fall season. Yet, year-round, a treasure trove of gemstones in rich earth tones is ripe for collecting. Take a look at some gems, jewelry and minerals in autumnal hues to kick start this colorful season. http://bit.ly/2PYstIJ Photo: Robert Weldon/GIA. Courtesy: Bjorn Anckar
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