The Talisman of Charlemagne: New Historical and Gemological Discoveries
Reveals new details about this historical jewel and the results of its first gemological analysis.
Land of Origins: A Gemological Expedition to Ethiopia
Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia.
U-Pb Ages of Zircon Inclusions in Sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for Geographic Origin
Establishes a metamorphic origin for sapphire samples from these deposits, supported by their trace-element composition and inclusion characterization, including the age dating of zircon inclusions.
Pleochroism and Color Change in Faceted Alexandrite: Influence of Cut and Sample Orientation
Shows how alexandrite’s color and color change are affected by cut and the orientation of table facets.
Provenance Discrimination of Freshwater Pearls by LA-ICP-MS and Linear Discriminant Analysis (LDA)
Investigates trace-element chemistry of freshwater natural pearls from North America and China with LA-ICP-MS and uses LDA to identify their origins.
Recycled Gemstones from Perpetuum Jewels
A wholesaler supplying the bridal market with recycled gemstones and antique cuts shares his thoughts on the market and on responsible practices.
CIBJO Blue Book and “Do’s and Don’ts” Guide on Responsible Sourcing
The World Jewellery Confederation (CIBJO) released the first edition of the Responsible Sourcing Book in January 2019.
Trapiche-Like Ruby from the Batakundi Mine, Kashmir
Trapiche-like ruby from Kashmir shows a well-formed fixed six-rayed pattern.
The Rock Hound: Muzo Emeralds and Ethical Practices
Susi Smither discusses her sustainable, responsible, and ethically based business practices.
Derek Katzenbach: Faceter, Gem Artist, Custom Jeweler
Jeff Hapeman: Stories from a Gem Cutter
Jeff Hapeman of Earth’s Treasury (Westtown, Pennsylvania) loves a gemstone with a good story.
A Variety of Colored Stones from Mayer & Watt
Mother-and-son team Laurie and Geoffrey Watt (Mayer & Watt, Maysville, Kentucky) noted that while there were plenty of customers at the AGTA show this year, the formula for success was a wide selection of materials and competitive pricing.
2019 Jewelry Industry Summit
The third Jewelry Industry Summit, held in Tucson February 2–3, revealed the successful implementation of several initiatives mapped out since the conference’s inception in 2016.
Studies on Tourmaline, Sapphire, Cultured Pearl, and a Reliquary of Legend…
Jewelry Development Impact Index
The Jewelry Development Impact Index (JDI), one of the initiatives from the second Jewelry Industry Summit in January 2017, has become the flagship project of the Minerals, Materials and Society (MMS) program at the University of Delaware. Patricia Syvrud, development manager of MMS, discussed the program, which she calls a “road map to responsibility.”
Large Faceted Gahnospinel
Advanced testing helps to identify the largest gahnospinel seen at any GIA laboratory.
Sourcing Stones with Columbia Gem House
Thoughts from a longtime Tucson exhibitor on responsible practices and the changing market trends.
The Granada Gallery
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