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  2. Canary Diamond - Wikipedia

    en.wikipedia.org/wiki/Canary_Diamond

    The Canary Diamond is an uncut canary-yellow 17.86 carat diamond found in 1917 at what is now the Crater of Diamonds State Park in Arkansas. [1] [2] ...

  3. Gemological Institute of America - Wikipedia

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

    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 ] As of 2024, the institute is headquartered in Carlsbad, California , and operates in 13 countries, with 11 campuses, 9 laboratories, and 4 research centers.

  4. Crater of Diamonds State Park - Wikipedia

    en.wikipedia.org/wiki/Crater_of_Diamonds_State_Park

    The price: $750,000. The tourist operation continued as the centerpiece of Crater of Diamonds State Park. Understandably, this special gem became closely associated with the State of Arkansas, "The Natural State." A large diamond symbol has dominated the state flag since 1912. The federal government issued an Arkansas State quarter coin in 2003.

  5. Uncle Sam (diamond) - Wikipedia

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

    The company described those diamonds as being so hard that they could only be cut using powder of other Arkansas diamonds. [4] The final result was a 12.42-carat (2.484 g) emerald-cut gem. It was characterized as M on the diamond color scale; this nominally corresponds to a faint yellow color, but the visual impression of Uncle Sam has been ...

  6. Diamonds as an investment - Wikipedia

    en.wikipedia.org/wiki/Diamonds_as_an_investment

    In contrast to precious metals, there is no universal world price per gram for diamonds. The industry refers to price guides. Rough diamond prices have historically been impacted by the mining companies controlling supply, most notably De Beers. However, after the dismantling of the De Beers cartel in 2001, the industry is now more fragmented ...

  7. 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 ...

  8. Diamond color - Wikipedia

    en.wikipedia.org/wiki/Diamond_color

    Diamond color grading chart. Refers to a grading scale for diamonds in the normal color range used by internationally recognized laboratories (GIA, IGI, & GCAL by Sarine for example). The scale ranges from D which is totally colorless to Z which is a pale yellow or brown color.

  9. Diamond type - Wikipedia

    en.wikipedia.org/wiki/Diamond_type

    Type Ib diamonds absorb green light in addition to blue, and have a more intense or darker yellow or brown colour than Type Ia diamonds. The stones have an intense yellow or occasionally brown tint; the rare canary diamonds belong to this type, which represents only 0.1% of known natural diamonds. The visible absorption spectrum is gradual ...

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