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Rose Channels in Ruby
Appendix 1: Comparison of LA-ICP-MS and EPMA Data, Part 1
"The Ethics of Jewelry" at MetFridays
A summary of “The Ethics of Jewelry” panel, held at New York’s Metropolitan Museum of Art on January 25, 2019.
Useful Visual Clue Indicating Corundum Heat Treatment
Shows the conversion of limonitic residues to hematite in surface-reaching inclusions, a practical indication of heat-treated corundum.
Chrysoberyl from the New England Placer Deposits, New South Wales, Australia
Examines a collection of chrysoberyl samples from these sapphire placer deposits to determine their distinct mineralogical and chemical properties.
Diamond Trader Ishaia Gol
Russian Synthetic Ametrine
Dumortierite-Quartz Rock Presented as Sapphire
The Gem Testing Laboratory of Jaipur, India, received for identification an opaque blue specimen, submitted as sapphire.
The Identification of Turquoise by Infrared Spectroscopy and X-Ray Powder Diffraction
Characterization of Emeralds from a Historical Deposit: Byrud (Eidsvoll), Norway
An emerald deposit at Byrud, in southern Norway, yielded significant quantities of crystals and gem rough in the late 19th and early 20th centuries.
Steam-Dyed Amber
Testing identifies a new treatment method as the cause of color in beeswax amber.