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2. Gemological Institute of America - Wikipedia

   en.wikipedia.org/wiki/Gemological_Institute_of...

   While both reports contain a number of measurements, including dimensions, proportions, carat weight, color, and clarity, the Diamond Grading Report also includes a diamond plot (a graphic representation of the position and type of inclusions present in the diamond). Diamond reports from GIA (as well as other, for-profit sources) are now ...

3. Diamond clarity - Wikipedia

   en.wikipedia.org/wiki/Diamond_clarity

   Diamond certified FL (flawless) by the GIA Two diamonds of grade VS 1 and SI 2 respectively. The GIA diamond grading scale is divided into six categories and eleven grades. [2] The clarity categories and grades are: [3] Flawless category (FL) diamonds have no inclusions or blemishes visible under 10× magnification. [3]

4. List of diamonds - Wikipedia

   en.wikipedia.org/wiki/List_of_diamonds

   Discovered in 2015, it is the 5th largest diamond ever discovered at the Crater of Diamonds State Park, Arkansas Identified as a Type IIa crystal, the 8.52 carat diamond was cut and polished by Mike Botha into a custom-designed 4.605 carat Triolette shape during a week long event in North Little Rock and was graded a D IF, 0 Polish & 0 Symmetry ...

5. Brilliant (diamond cut) - Wikipedia

   en.wikipedia.org/wiki/Brilliant_(diamond_cut)

   These stones (such as EightStar-brand diamonds) have less light leakage at the edge of the stone (for a given crown angle, pavilion angle, and table ratio). Some diamonds with painted girdles receive lower grades in the GIA's cut grading system, for reasons given in a 2005 GIA article. [11] Several groups have developed diamond cut grading ...

6. Archduke Joseph (diamond) - Wikipedia

   en.wikipedia.org/wiki/Archduke_Joseph_(diamond)

   It is, on the Gemological Institute of America (GIA) color and clarity scales, a D grade (colorless to the highest grade), IF (Internally Flawless, flawless to the second highest grade) diamond (in short: a DIF or a DIF diamond) and the largest DIF ever graded at the GIA; and it is of type IIa (as determined by the Gübelin Gem Lab of Lucerne ...

7. Graff (jewellers) - Wikipedia

   en.wikipedia.org/wiki/Graff_(jewellers)

   Graff adheres to the Kimberley Process, never knowingly buying or trading rough diamonds from areas where this would encourage conflict or human suffering. [9] The majority of Graff diamonds are laser engraved with unique Gemological Institute of America (GIA) tracking numbers, which whilst invisible to the naked eye, allow for their origin to be traced. [10]

8. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   Gemological Institute of America (GIA) was the first laboratory in America to issue modern diamond reports, [33] and is held in high regard amongst gemologists for its consistent, conservative grading. Diamond High Council (HRD) Official certification laboratory of the Belgian diamond industry, located in Antwerp. [34]

9. International Gemological Institute - Wikipedia

   en.wikipedia.org/wiki/International_Gemological...

   IGI provides independent grading reports, colored stone reports, identification and appraisal reports, diamond authentication and attestations of origin, and laser inscription services. They also offers diamond and colored stone courses through IGI's Schools of Gemology. [7] Graduates from the IGI school of Gemology are awarded an IGI Diploma.