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IGI Introduces Cut Grading for Fancy Shaped Diamonds

Institute providing information on all value-setting “Cs” for all shapes

Antwerp, Belgium (September 1, 2022) – The International Gemological Institute (IGI), the world’s largest independent gemological laboratory, has added a cut grade to its reports for loose fancy shaped diamonds. In addition to traditional polish and symmetry analysis, the institute will now assess the influence of cut quality on light behavior seen in fancy shapes.

“For many decades Carat, Color and Clarity were the main points of emphasis with consumers,” stated IGI CEO Roland Lorie. “In recent years we have seen increasing attention drawn to Cut, first with rounds and now with fancies. IGI has proactively responded to the growing demand for this assessment, in the interest of better serving buyers and sellers alike.”

Unlike round diamonds, for which light behavior can be predicted with measurements, cut grades for fancy shapes are practically non-existent among the major institutes due to more underlying complexity. For this reason, IGI designed a four-step system combining proportions requirements with visual assessment, explained in a video at

“We use proportions ranges to identify candidates for the Excellent grade, but our gemologists are now evaluating light return, in addition to polish and symmetry,” noted IGI Laboratory Director Benoit Scheyvaerts. “Given the wide optical variety of fancy shapes, this is not a dispersion or scintillation analysis. It is a basic assessment of overall light return versus darkness.”

Originally piloted with a small group of clients, IGI will now add the cut grade to fancy shape reports at all 20 laboratories worldwide. That grade will be optional to manufacturers for a six- month period of adjustment. In the interest of industry-wide improvement IGI is providing “Guidelines for Excellent” to all producers, identifying ranges of proportions and other factors the institute’s laboratory locations have historically observed to accompany fancy shaped diamonds with the most positive beauty components.

About IGI
The International Gemological Institute (IGI) has 20 laboratories and 14 education facilities in major diamond and jewelry centers around the world. For 45 years, IGI has provided the fine jewelry community and consumers with a broad range of services including natural and laboratory grown diamond reports, colored stone grading and origin reports, as well as jewelry identification and appraisal reports. With the increase of lab grown diamonds in the marketplace, IGI screens millions of natural and lab grown diamonds in order for the industry and consumers to receive the product they expect. Regardless of location or marketplace, an authentic IGI Laboratory Report is the common language of trust and confidence in the gemological world.

Media Contacts
IGI North America – Director of Marketing
Susan Baughman
[email protected]

Public Relations
Jen Cullen Williams
[email protected]

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