Diamond’s Origin: Unraveling the Mystery with Dr. James Shigley

Top GIA Fellow Claims Science Cannot Determine Diamond Origin

Dr. James Shigley, a distinguished research fellow at the Gemological Institute of America (GIA), stated that it is highly unlikely to identify a diamond’s origin based on its physical characteristics. He explained that diamonds lack distinctive visual features that would determine their provenance, and the samples of stones often do not provide enough information. The only possible indication of a diamond’s origin is trace elements, which are difficult to analyze due to their low concentration and do not typically reveal where the stone came from.

According to Dr. Shigley, the chemical composition of diamonds reflects geological processes in the mantle and is not related to their current location on the earth’s surface. Studies conducted to determine a diamond’s origin have been limited in size and range of locations, making it challenging to confirm the source of a stone now or in the future. However, he mentioned that identifying the origin of a diamond by matching its polished form to the rough stone of known provenance is possible with Diamond Origin Reports offered by GIA, with a success rate of around 90%. This method is more effective than studying a polished diamond alone, as it involves creating a chain of custody for accurate tracking and tracing.

During his LinkedIn Live session sponsored by GIA, Dr. Shigley discussed other topics such as determining the origin of colored gemstones and lab-grown diamonds. He answered questions from his audience and provided insights into gemology’s complex world. To learn more about this topic and access the full recording of his GEMTalks event, visit [insert link]. The GIA aims to protect consumers and support the global gem and jewelry trade through research, education, and laboratory services. Stay informed by signing up for their diamond and jewelry industry news and analysis.[/

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