Mobile Inclusions in a Decorative Quartz Object
Inspired fashioning showcases mobile inclusions in a polished quartz specimen, reminiscent of an hourglass.
Rare Mixed Type IaB-IIb Diamond with a Long-Lasting Phosphorescence
Phosphorescent-based screening initially results in a rare mixed-type natural diamond falsely testing as laboratory-grown.
Natural Freshwater Pearls from Europe: Russia, Scotland, and Germany
Analysis of eight European freshwater pearls of known provenance gives pearl specialists the opportunity to add greatly to GIA’s identification database.
Unique Non-Bead Cultured Freshwater Pearls from Lake Biwa, Cultured for 14 Years
Pearls from Lake Biwa mussels, left alone for 14 years, make an intriguing preliminary study of time-frame effects.
Unique Metal Sulfide Inclusion in “Bing Piao” Red Agate from Liangshan, China
Pyrite particles included in a “black grass” red agate are unique to material from Liangshan, China, and serve as indicators of origin.
Agate Inclusion in Quartz from Brazil
Agate appears as an interesting inclusion in a pair of faceted quartzes.
Calcareous Coral and Epoxy Composite
Meticulous testing of a bangle submitted to a Taiwan gemology lab proves it to be a composite of red calcareous coral and epoxy.
Mignone Halls of Gems and Minerals
Eye-popping specimens are on display at the revitalized and newly-reopened Mignone Halls of Gems and Minerals at the American Museum of Natural History in New York City.
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