Research Article Search Results
History of the Chivor Emerald Mine, Part I (1880–1925): From Rediscovery to Early Production
Chronicles developments at the Chivor emerald mine in Colombia between 1880 and 1925, based on archival records.
Pallasitic Peridot with Iridescent Needle-Like Inclusions
Numerous needle-like inclusions exhibit vibrant interference colors in a suite of pallasitic peridot from the Jepara meteorite.
Formation of the “Matryoshka” Diamond from Siberia
A freely moving diamond crystal completely enclosed in a diamond from Siberia gets its name from the famous Russian nesting dolls.
Diamond with Cavities Showing Radiation Evidence
Diamond formed at incredible depth shows evidence of radioactive fluids in cavities surrounded by green fluorescence halos.
Nephrite Jade from Multiple Sources
Green nephrite deposits are found at many locations around the globe, with British Columbia, Siberia, and northwestern China as the leading producers.
Diamond with Mobile Green Diamond Inclusion
Diamond inclusions are relatively common guests in diamond crystals.
Solid Carved Dark Gray Diamond Ring
A ring made entirely of natural diamond was recently submitted to GIA’s New York laboratory.
Diamonds Are Not Forever! Diamond Dissolution
Violent kimberlite eruptions impact the surface features of diamonds, which can give scientists useful information about how diamonds react with the fluids in the mantle.
Phenomenon Resembling Play-of-Color in Sapphire
A phenomenon resembling play-of-color was seen in a 4.13 ct unheated sapphire recently examined by the author.
Ethical Gem Fair
A transparent supply chain and the education of artisanal miners were two of the many topics discussed at Tucson’s first Ethical Gem Fair.
Saltwater Bead Cultured Pearl with Laminated Nucleus
Bismuth Glass-Filled Burmese Star Ruby
The Hong Kong laboratory recently examined a Burmese star ruby incorporating a significant amount of bismuth glass.
