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  2. 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]

  3. Diamond cut - Wikipedia

    en.wikipedia.org/wiki/Diamond_cut

    Diamond's RI is responsible for its brilliance—the amount of incident light reflected back to the viewer. Also important is a diamond's dispersive power—the ability of the material to split white light into its component spectral colors—which is also relatively high, at 0.044 (as measured from the B-G interval). The flashes of spectral ...

  4. Art Deco - Wikipedia

    en.wikipedia.org/wiki/Art_Deco

    Art Deco, short for the French Arts décoratifs (lit. ' Decorative Arts '), [1] is a style of visual arts, architecture, and product design, that first appeared in Paris in the 1910s (just before World War I), [2] and flourished in the United States and Europe during the 1920s to early 1930s.

  5. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    The global jewelry market size was valued at USD 353.26 billion in 2023 and is expected to grow at a compound annual growth rate (CAGR) of 4.7% from 2024 to 2030. [87] As of 2022, the global jewelry market was valued at approximately $270 billion and is projected to grow to over $330 billion by 2026.

  6. Engagement ring - Wikipedia

    en.wikipedia.org/wiki/Engagement_ring

    Rings with a larger diamond set in the middle and smaller diamonds on the side fit under this category. Three-stone diamond engagement rings, sometimes called trinity rings or trilogy rings, are rings with three matching diamonds set horizontally in a row with the bigger stone placed in the center. The three diamonds on the ring are typically ...

  7. 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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