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Horn shaped jewel pendant featuring emeralds, rubies, diamonds and pearls, and shows engravings in Arabic.
Article
Centuries of Opulence: Jewels of India

Learn about the journey of gemstones used to create the fabulous Indian jewelry featured in this special exhibit at GIA in Carlsbad.

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Suite containing over 36 carats of Yogo sapphire
Gemological Characterization of Sapphires from Yogo Gulch, Montana

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

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Kasumigaura pearl necklace and recently harvested nucleated pearls
Cultured Pearls from Lake Kasumigaura: Production and Gemological Characteristics

Examines Japanese “Kasumiga” freshwater cultured pearls, which grow in a variety of colors.

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Timeline showing the use of garnets in different eras from 300 BCE to 700 CE
An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road

Analyzes the chemical composition and inclusion characteristics of this ancient artifact.

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Grading the Hope Diamond

One of the most popular exhibits at the Smithsonian Institution, the stunning Fancy Dark grayish blue Hope diamond was formally graded by GIA’s gem laboratory.

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Diamond Fun Facts

Learn more about one of the Earth’s most fascinating creations, including some that became the most famous.

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Major colors of HPHT synthetic diamonds
Observations on HPHT-Grown Synthetic Diamonds: A Review

Summarizes statistical data and distinctive features of several thousand gem-quality HPHT synthetic diamonds examined by GIA from 2007 through 2016.

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Shor
Auction Houses: A Powerful Market Influence on Major Diamonds and Colored Gemstones

A report on how high-profile jewelry auctions have affected the gem and jewelry market.

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Gerd Dreher agate lily and Patrick Dreher citrine mouse
Gem Virtuosos: The Drehers and Their Extraordinary Carvings

A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.

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GIA Museum display on liddicoatite tourmaline at the 2018 Tucson Gem and Mineral Show.
Zoning In on Liddicoatite Exhibit

An exhibit at the Tucson Gem and Mineral Show dedicated to former GIA president Richard T. Liddicoat (1918–2002).

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