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  2. Moissanite - Wikipedia

    en.wikipedia.org/wiki/Moissanite

    A moissanite engagement ring Moissanite: emerald cut. Moissanite was introduced to the jewelry market as a diamond alternative in 1998 after Charles & Colvard (formerly known as C3 Inc.) received patents to create and market lab-grown silicon carbide gemstones, becoming the first firm to do so. By 2018 all patents on the original process world ...

  3. Diamond (gemstone) - Wikipedia

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

    Since the per carat price of diamond shifts around key milestones (such as 1.00 carat (200 mg)), many one-carat diamonds are the result of compromising cut for carat. Some jewelry experts advise consumers to buy a 0.99-carat (198 mg) diamond for its better price or buy a 1.10-carat (220 mg) diamond for its better cut, avoiding a 1.00-carat (200 ...

  4. Diamond color - Wikipedia

    en.wikipedia.org/wiki/Diamond_color

    5.0 5.0–5.49 Tinted color 2 Low Cape ... pink diamonds fetched higher prices after Jennifer Lopez received a pink diamond engagement ring. ... a 7-carat (1.4 g ...

  5. Cullinan Diamond - Wikipedia

    en.wikipedia.org/wiki/Cullinan_Diamond

    The Cullinan Diamond is the largest gem-quality rough diamond ever found, [2] weighing 3,106 carats (621.20 g), discovered at the Premier No.2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the owner of the mine. In April 1905, it was put on sale in London, but despite considerable interest, it was still ...

  6. Synthetic diamond - Wikipedia

    en.wikipedia.org/wiki/Synthetic_diamond

    In April 2022, CNN Business reported that a synthetic one carat round diamond commonly used in engagement rings was up to 73% cheaper than a natural diamond with the same features, and that the number of engagement rings featuring a synthetic or a lab grown diamond had increased 63% compared to the previous year, while the those sold with a ...

  7. Yogo sapphire - Wikipedia

    en.wikipedia.org/wiki/Yogo_sapphire

    A 0.19-carat (0.038 g) diamond cut cornflower blue Yogo sapphire ... Claims that the gem in the engagement ring of Lady Diana Spencer and Kate Middleton is a Yogo are ...

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