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References: 1. Gemological Institute of America[removed]Diamond Grading Lab Manual. Gemological Institute of America
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Document Date: 2012-10-09 21:05:59

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City

New York / Son / /

Company

Gemworld International Inc. / Butterworth & Co. / Ashland Press Inc. / /

Country

Belgium / /

Facility

Gemological Institute of America / German Standards Institute / /

Organization

German Standards Institute / Gemological Institute of America / International Organization of Standardization / Standards Committee for Optics and Precision Mechanics / /

Person

Rudolf Biehler / Stephen C. Hofer / John I. Koivula / Gary A. Roskin / Verena Pagel-Theisen / /

ProvinceOrState

New York / /

PublishedMedium

Gems & Gemology / /

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