Examines the origin and nature of tarnish spots in high-purity gold and how they can be avoided.
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Article
GIA’s Jewelry Forensics seminar teaches students to become jewelry detectives as they assess jewelry design and engineering for quality.
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Article
Alan Nacht continues his family’s legacy - Bernard Nacht & Co. – and his quest for unforgettable jewelry.
Read MoreEvaluate the quality of platinum jewelry that was furbished by burnishing. Contains video and illustrations.
Read MoreEvaluate the quality of platinum jewelry that has been worn and then refinished.
Read MoreQuality Assurance Benchmarks provide an objective method for ensuring the production and presentation of quality jewelry. Learn how to compare jewelry against acknowledged criteria, how to achieve quality workmanship at the bench, and the unique characteristics of various alloys.
Read MoreQuality Assurance Benchmarks highlight workmanship of semi-finished and finished platinum jewelry. These examples illustrate methods for evaluating the quality and durability of platinum prongs and settings.
Read MoreLearn best practices for prefinishing platinum jewelry. Contains detailed illustrations and photographs.
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Exploration of a chart designed to give jewelers and gemologists a practical guide to identifying synthetic diamonds as they enter the jewelry trade.
Read MoreRussian-grown gem-quality synthetic diamonds are being sold for jewelry; this article presents the results of a gemological examination of a group of yellow samples.
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