The 3309 cm–1 Series in Sapphire and Ruby: A Focus on FTIR Peak Position Variation
Investigates the correlations between peak positions in the 3309 cm–1 series with trace element concentrations for ruby, metamorphic and basalt-related blue sapphire, and laboratory-grown sapphire.
Emeralds in Catherine de’ Medici’s Pendant: An Unexpected Geographic Origin
Archival research and gemological characterization reveal the geographic origin of two emeralds set in a pendant linked to Catherine de’ Medici, Queen of France from 1547 to 1559.
A Study of the Winston Red: The Smithsonian’s New Fancy Red Diamond
Presents the first scientific and historical study conducted on the 2.33 ct Winston Red, the fifth-largest known Fancy red diamond in existence.
CVD-Grown Diamond with an Unusual Blue Band
Checkered Pattern on Diamond
Assembled Bead Cultured Half-Pearl
Investigation in the Carlsbad laboratory reveals a pearl submission is not mabe as initially believed.
Wearable Art Jewelry Supporting Families in Guatemala
Quarterly Crystal: Fluorite in Quartz from China
Lepidolite in Copper-Bearing Tourmaline
Kyanite in Quartz
“Hummingbird” in Orangy Yellow Diamond
Evil Eye in a Flux-Healed Mong Hsu Ruby
Devitrified Glass “Pom-Poms” in Ruby
Dendritic Patterns in Emerald
Copper in Indonesian Chalcedony
Aquamarine with Fluorite Inclusions
Rock Crystal Quartz Skull
Irreversible Photochromism in Synthetic Sapphire
Enormous South Sea Cultured Pearl with Filled and Partially Hollow Structure
Examination of a gigantic South Sea bead cultured pearl reveals an intriguing internal structure.
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