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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.
Books: The Art of Bulgari:La Dolce Vita and Beyond, 1950–1990
Etch Marks, Negative Crystals, and Etch Tubes in Spinel from Madagascar
A spinel from Madagascar, mixed in with a parcel of blue sapphire, exhibited an array of internal features.
Neptunite Inclusion in Benitoite
The Early History of Gemstone Treatments
Fall 2012 Gem News International
Fluorescence Produced by Optical Defects in Diamond
How variations in UV lamp output can affect observed fluorescence color and intensity.
Well-Formed Rutile Star in Quartz
Natural-Color Purple Diamonds from Siberia
Twelve natural-color purple diamond crystals from Siberia were studied using spectroscopic methods to better understand their color and its causes.
The Museum of London’s Extraordinary Cheapside Hoard
The history and mysteries behind a treasure of jewels hidden during the 1600s, a window to the past being fully opened to the public for the first time since a chance discovery a century ago.
