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Baltic Amber map
Article
Historical Reading List: Baltic Amber

Amber has been found in various parts of the world, but the main historical source is the land that surrounds the Baltic Sea.

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Article
GIA Gem Project
Various Gems
(Amblygonite - Axinite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Article
GIA Gem Project
Various Gems (Taaffeite - Zoisite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Article
GIA Gem Project
Various Gems
(Sapphirine - Stibiotantalite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Article
GIA Gem Project
Various Gems (Olivine - Rutile)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Article
GIA Gem Project
Various Gems
(Kornerupine - Natrolite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Article
GIA Gem Project
Various Gems
(Danburite – Humite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Article
GIA Gem Project
Various Gems (Barite - Cuprite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Pinctada maculata pearls and mollusk shell
The Gemological Characteristics of Pipi Pearls Reportedly from Pinctada maculata

Reveals the internal features and spectroscopic data of these small natural pearls and offers the means of separating them from pearls of related mollusk species.

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Star rhodochrosite from the Sweet Home mine, Colorado
Colored Stones and Pearls

Abstracts of speaker presentations from the “Colored Stones and Pearls” session of GIA’s 2018 International Gemological Symposium.

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