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  2. 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]

  3. Diamond color - Wikipedia

    en.wikipedia.org/wiki/Diamond_color

    Color grading of diamonds was performed as a step of sorting rough diamonds for sale by the London Diamond Syndicate. As the diamond trade developed, early diamond grades were introduced. Without any co-operative development, these early grading systems lacked standard nomenclature and consistency. Some early grading scales were; I, II, III; A, AA, AAA; A, B, C. Numerous terms

  4. Gemological Institute of America - Wikipedia

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

    Through its library and subject experts, GIA acts as a resource of gem and jewelry information for the trade, the public and media outlets. [2] In 1953 the GIA developed its International Diamond Grading System and the "four Cs" (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. [2]

  5. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    Clarity is one of the 4C's (color, clarity, cut and carat weight) that helps in identifying the quality of diamonds. The Gemological Institute of America (GIA) developed 11 clarity scales to decide the quality of a diamond for its sale value. The GIA clarity scale spans from Flawless (FL) to included (I) having internally flawless (IF), very ...

  6. Diamond enhancement - Wikipedia

    en.wikipedia.org/wiki/Diamond_enhancement

    The clarity, or purity, of a diamond refers to internal inclusions of the diamond, and is one of the 4-Cs in determining a diamond's value.Common inclusions that appear inside diamonds are black carbon spots and small cracks, commonly referred to as fractures or "feathers", due to their feathery whitish appearance when viewed from above or through the side.

  7. Pink diamond - Wikipedia

    en.wikipedia.org/wiki/Pink_diamond

    Like all diamonds, pink diamond clarity is measured on a scale from Flawless to Included. Only 7% of pink diamonds are either Flawless or Internally Flawless (IF), and majority are Slightly Included (SI). [16] Like most of the colors of fancy color diamonds, the clarity has little effect on a pink diamond's value. Since pink diamonds are formed ...

  8. 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 ...

  9. Richard T. Liddicoat - Wikipedia

    en.wikipedia.org/wiki/Richard_T._Liddicoat

    In 1953, Liddicoat introduced the GIA diamond grading system - a practical approach to grading the quality of colorless to light yellow polished diamonds on the basis of color, clarity, and cut. A central feature was the D-to-Z color grading system for faceted colorless to light yellow diamonds—the vast majority of diamonds seen in the trade.

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