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Research
Natural-Color Pink, Purple, Red, and Brown Diamonds: Band of Many Colors
Summarizes data collected by GIA on more than 90,000 natural diamonds in this color range and presents their gemological and spectroscopic properties.
Coated Pink Synthetic Moissanite
A pink synthetic moissanite is coated with a thin colored film, raising questions about the natural origin of its color.
Synthetic Moissanite Coated with Diamond Film Imitating Rough Diamond
A rough sample submitted as diamond is proven to be a synthetic moissanite with a thin diamond coating.
Single HPHT Synthetic Diamond Mixed in Natural Diamond Ring
Single HPHT laboratory-grown diamond identified in a ring containing 194 natural diamonds.
Nominal Type IaB Diamond with Detectable Uncompensated Boron
Examination of a type IaB diamond that exhibited instantaneous 2803 cm–1 FTIR absorption shortly after exposure to an ultra-short-wave UV source.
Colored Stones and Pearls | Gems & Gemology
Abstracts of speaker presentations from the “Colored Stones and Pearls” session of GIA’s 2018 International Gemological Symposium.
Futurescape Forum
A recap of the Futurescape Forum panel from GIA’s 2018 International Gemological Symposium.
Diamond Geology
Poster abstracts on “Diamond Geology” from GIA’s 2018 International Gemological Symposium.
Diamond Identification
Poster abstracts on “Diamond Identification” from GIA’s 2018 International Gemological Symposium.
Diamond Identification
Abstracts of speaker presentations from the “Diamond Identification” session of GIA’s 2018 International Gemological Symposium.
Colored Stones and Pearls
Poster abstracts on “Colored Stones and Pearls” from GIA’s 2018 International Gemological Symposium.
