Research & News

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G&G Winter 2019 Cover
Winter 2019 G&G: Geographic Origin Special Issue

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This 0.62 carat green “matryoshka” diamond from Siberia has an internal cavity, connected by two small channels to the outside. A small diamond crystal moves freely inside. Courtesy of Alrosa. Photo by Jianxin (Jae) Liao/GIA
GIA Researchers Reveal the Secrets to Diamond-in-a-Diamond Mystery

Researchers examined one of the most interesting and unique diamond crystals ever found.

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This GIA-graded Fancy Deep blue 7.03 ct diamond from London jeweler Moussaieff drew a top bid of $11.6 million ($1.65 million per carat) at Christies Nov. 12 Geneva auction. Photo courtesy of Christie's Images Ltd.
Diamond Market in Recovery, Top-end Auction Results

World’s two largest diamond producers say market is stabilizing after severe cutbacks in rough sales.

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Anna Hu’s necklace design features a 100.02 cushion-shaped Fancy Intense yellow diamond showcased in the shape of a Chinese musical instrument – Dunhuang pipa – and embellished with variously shaped and brilliant-cut diamonds mounted in 18K white and yellow gold. The pipa can be detached and worn as a pendant/brooch. It sold for $5,780,056. Photo by Michael Oldford. Courtesy of Sotheby’s
Bullish Predictions for 2019 Holiday Sales Despite Concerns, Sotheby’s Hong Kong Auction Sales

U.S. holiday sales predictions look good. Sotheby’s Hong Kong auction features GIA alumna pieces.

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Operations at Alrosa’s Lomonosov deposit in Western Russia. Alrosa, along with De Beers, has drastically reduces sales of rough diamonds to deal with the supply overhang. Photo Russell Shor/GIA
US Consumer Confidence Remains Strong; Alluvial Diamond Tracking and Illegal Gold

U.S. consumer confidence has kept the economy from sliding into a possible recession.

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GIA researchers respond to rapidly changing gem treatment and synthesis technologies with cutting edge technology and analyze gems from known sources. Their work deepens the world’s understanding of how gems are formed, extracted, manufactured and sold. A group photo from a 2018 GIA research team meeting. Photo by Eric Welch/GIA
Guardians of Trust: GIA’s Innovative Research, Instruments and Services

GIA’s services, instruments address new treatments and laboratory-grown gems as they enter the market.

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A 17 mm baroque Tahitian cultured pearl is the focal point of this whimsical octopus brooch set in black-plated 18K gold. The brooch features 374 black, 26 yellow and 169 white diamonds. Courtesy of Ron Greenidge and Emiko Pearls International. Photo by Robert Weldon/GIA
A Tropical Paradise of Ocean-Inspired Jewelry and Gemstones

Escape to a warm-water paradise with these jewels and gemstones that evoke the ocean’s essence.

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