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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. Engagement ring - Wikipedia

    en.wikipedia.org/wiki/Engagement_ring

    Engagement rings in India are often part of elaborate jewelry sets exchanged during traditional ceremonies. These rings, typically crafted from gold, align with cultural preferences for ornate and symbolic designs. [57] In Japan, engagement rings are known for their minimalist and high-quality designs. This reflects Japan's cultural preference ...

  4. Cubic zirconia - Wikipedia

    en.wikipedia.org/wiki/Cubic_zirconia

    In 1977, cubic zirconia began to be mass-produced in the jewelry marketplace by the Ceres Corporation, with crystals stabilized with 94% yttria. Other major producers as of 1993 include Taiwan Crystal Company Ltd , Swarovski and ICT inc. [ 8 ] [ 5 ] By 1980, annual global production had reached 60 million carats (12 tonnes) and continued to ...

  5. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    Conversely, the jewellery industry in the early 20th century launched a campaign to popularise wedding rings for men, which caught on, as well as engagement rings for men, which did not, go so far as to create a false history and claim that the practice had medieval roots. By the mid-1940s, 85% of weddings in the U.S. featured a double-ring ...

  6. Tension ring - Wikipedia

    en.wikipedia.org/wiki/Tension_ring

    Tension ring. A tension ring is a type of finger ring that holds a gemstone in place by pressure rather than prongs, a bezel or other mounting. The metal setting is actually spring-loaded to exert pressure onto the gemstone, and tiny etchings or grooves in the metal create a shelf that supports the gemstone's edges.

  7. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    In October 2014, Sotheby's Hong Kong achieved consecutive per-carat price records for Kashmir sapphires – first with the 12.00 carat Cartier sapphire ring at US$193,975 per carat, then with a 17.16 carat sapphire at US$236,404, and again in June 2015 when the per-carat auction record was set at US$240,205. [39]

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