Research Article Search Results
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.
Triplite in Beryl
Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.
Reversible Twinning in Neodymium Pentaphosphate
Application of slight pressure perpendicular to the twinning planes reveals the unusual property of this synthetic gem.
Diamond with Cavities Showing Radiation Evidence
Diamond formed at incredible depth shows evidence of radioactive fluids in cavities surrounded by green fluorescence halos.
Solid Carved Dark Gray Diamond Ring
A ring made entirely of natural diamond was recently submitted to GIA’s New York laboratory.
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.
Bismuth Glass-Filled Burmese Star Ruby
The Hong Kong laboratory recently examined a Burmese star ruby incorporating a significant amount of bismuth glass.
Staurolite in Ruby
Conspicuous bright brownish red crystals in ruby matrix are the first recorded observations of staurolite in corundum.
Quarterly Crystal: Unknown Inclusion in Triphane Spodumene
Afghani spodumene hosts an unidentified translucent orange crystal surrounded by an iridescent cleavage halo.
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.
The Evolution of Chinese Jade Carving Craftsmanship
Explores the art form of jade carving in China across five periods from the late Neolithic Age to the present day.
Rhodonite-Pyroxmangite from Tanatz Alp, Switzerland
Investigates the chemical, physical, and gemological properties of attractive rhodonite-rich rocks from this Swiss deposit.
