Natural Blister From Entombment Of A Pearlfish Within A Pinctada Maxima Shell
A blister in a P. maxima shell, formed when the mollusk's nacre covered a trapped pearlfish, preserves the fish in stunning detail.
Five CVD Synthetic Diamonds Greater Than Three Carats
The GIA lab examines five gem-quality CVD-grown diamonds in sizes that reflect the improving technology of the synthetic gemstone industry.
HPHT-Processed Diamond Fraudulently Represented as Untreated
An HPHT-treated round brilliant diamond with an inscription that presents as a GIA report number is found to be inconsistent with the institute's report, previously issued for an untreated diamond.
Cat's-Eye Demantoid and Brown Andradite with Horsetail Inclusions
The examination of two unusual garnets results in identifications issued for the first time in GIA's colored stone report records.
Fracture-Filled Diamond with "Rainbow" Flash Effect
The material used to fill a large fracture in a diamond yields an unexpected iridescence under two different illuminations.
New Plastic Imitation Opal from Kyocera
A plastic product that mimics the play-of-color phenomenon of natural opal but has distinctly different gemological properties is now available to consumers.
Fancy Deep Brown-Orange CVD Synthetic Diamond
Unusual Orange Pyrope-Spessartine-Grossular Garnet
A garnet proves to have a much higher grossular component than initially expected.