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Keywords = Quantagenetics®

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12 pages, 2695 KiB  
Article
Diamonds Certify Themselves: Multivariate Statistical Provenance Analysis
by Catherine E. McManus, Nancy J. McMillan, James Dowe and Julie Bell
Minerals 2020, 10(10), 916; https://doi.org/10.3390/min10100916 - 16 Oct 2020
Cited by 16 | Viewed by 4243
Abstract
The country or mine of origin is an important economic and societal issue inherent in the diamond industry. Consumers increasingly want to know the provenance of their diamonds to ensure their purchase does not support inhumane working conditions. Governments around the world reduce [...] Read more.
The country or mine of origin is an important economic and societal issue inherent in the diamond industry. Consumers increasingly want to know the provenance of their diamonds to ensure their purchase does not support inhumane working conditions. Governments around the world reduce the flow of conflict diamonds via paper certificates through the Kimberley Process, a United Nations mandate. However, certificates can be subject to fraud and do not provide a failsafe solution to stopping the flow of illicit diamonds. A solution tied to the diamonds themselves that can withstand the cutting and manufacturing process is required. Here, we show that multivariate analysis of LIBS (laser-induced breakdown spectroscopy) diamond spectra predicts the mine of origin at greater than 95% accuracy, distinguishes between natural and synthetic stones, and distinguishes between synthetic stones manufactured in different laboratories by different methods. Two types of spectral features, elemental emission peaks and emission clusters from C-N and C-C molecules, are significant in the analysis, indicating that the provenance signal is contained in the carbon structure itself rather than in inclusions. Full article
(This article belongs to the Special Issue Analytical Tools to Constrain the Origin of Minerals)
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