The Very Deep Origin of the World’s Biggest Diamonds
Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular, and Resorbed), that formed in a superdeep environment.
Gota de Aceite in a Zambian Emerald
A phenomenon usually seen in Colombian emeralds is found in a specimen from Zambia.
Gem Virtuosos: The Drehers and Their Extraordinary Carvings
A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
Akoya Cultured Pearl Farming in Eastern Australia
Characterizes the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata mollusks.
Quarterly Crystal: Shattuckite in Quartz
A quartz crystal from Namibia, hosting of spherulitic to circular masses of shattuckite, is examined.
Inclusions in Natural, Synthetic, and Treated Ruby
Provides a visual guide to the internal features of natural, synthetic, and treated rubies.
Real-Time Microradiography of Pearls: A Comparison Between Detectors
Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).
Accurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards
Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.
Wollastonite Blizzard Within Glass
Beads believed to be synthetic quartz are discovered to be glass with a surprising set of inclusions.
Vesuvianite in Burmese Ruby
A yellowish green crystal inclusion in a ruby is found to be vesuvianite.