Samantha Sibley
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Samantha SibleySamantha has worked at the De Beers Group of Companies since 1992. She has an HNC in Physics and gained the Gem Diamond Diploma from the Gemmological Association of Great Britain in 1996. Samantha has experience in microscopy, sample preparation (lasering/polishing) and spectroscopy. She is involved in using spectroscopic techniques such as infrared absorption and photoluminescence to investigate properties of natural, synthetic and treated diamonds. This work has resulted in a number of publications in both gemological and scientific journals.

Her current role is focused on providing technical presentations related to consumer confidence issues, instrument training and workshops both internally and for the wider diamond trade.


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Mission Statement

The American Gem Society (AGS) is a nonprofit trade association of fine jewelry professionals dedicated to setting, maintaining and promoting the highest standards of ethical conduct and professional behavior through education, accreditation, recertification of its membership, gemological standards, and gemological research.

The Society is committed to providing educational products to inform and protect the consumer and to contributing to the betterment of the trade by creating industry standards to protect the jewelry-buying public and the fine jewelry industry as a whole.

AGS Laboratories, founded to support the AGS mission, is a nonprofit diamond grading laboratory with a mission of consumer protection. Adhering to the AGS Diamond Grading Standards, AGS Laboratories is dedicated to offering diamond grading reports that provide consistency and accuracy based on science.

American Gem Society

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