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  2. Moissanite - Wikipedia

    en.wikipedia.org/wiki/Moissanite

    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-wide had expired.

  3. Topaz - Wikipedia

    en.wikipedia.org/wiki/Topaz

    Topaz is a silicate mineral made of aluminum and fluorine with the chemical formula Al 2 Si O 4 (F, OH) 2.It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange. [7]

  4. De Beers - Wikipedia

    en.wikipedia.org/wiki/De_Beers

    The new lab-grown diamonds retail for about one-tenth the cost of naturally occurring diamonds. The new brand began selling in September 2018 and the stones are produced in Gresham, Oregon, a $94 million facility using the region's cheap electricity, which opened in 2018 with the capacity for 500,000 rough carats of diamonds per year. [58] [59 ...

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  6. Ruby - Wikipedia

    en.wikipedia.org/wiki/Ruby

    Ruby is a pinkish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. [3]

  7. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to ...

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