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  2. Spinel - Wikipedia

    en.wikipedia.org/wiki/Spinel

    It is widely used as an inexpensive cut gem in birthstone jewelry for the month of August. Light blue synthetic spinel is a good imitation of aquamarine beryl, and green synthetic spinel is used as an emerald or tourmaline simulant. [29] By 2015, transparent spinel was being made in sheets and other shapes through sintering. [30]

  3. Move over diamonds, these little-known gemstones are heating up

    www.aol.com/move-over-diamonds-little-known...

    In 2016, jeweler Olivia Young of Ouroboros sold a red spinel ring for £6,000 ($7,700). Last year, the client’s insurance company paid out £30,000 ($38,400) to replace it.

  4. Hope Diamond - Wikipedia

    en.wikipedia.org/wiki/Hope_Diamond

    The Hope Diamond is a 45.52 carats (9.104 g; 0.3211 oz) diamond that has been famed for its great size since the 18th century. Extracted in the 17th century from the Kollur Mine in Guntur, India, [1] [2] the Hope Diamond is a blue diamond.

  5. French Crown Jewels - Wikipedia

    en.wikipedia.org/wiki/French_Crown_Jewels

    Crown Jewels of France, on display at the Louvre with the crown and diadem of Empress Eugénie to the left, the set of Queen Marie Amélie in the centre, and the crown of Louis XV to the right with the diadem of the Duchess of Angoulême The Côte-de-Bretagne red spinel with the set of Queen Marie Amélie to the left, the bracelets and diadem of the Duchess of Angoulême in the centre and ...

  6. Diamond simulant - Wikipedia

    en.wikipedia.org/wiki/Diamond_simulant

    Titanite or sphene is also seen in antique jewelry; it is typically some shade of chartreuse and has a luster, RI (1.885–2.050), and dispersion (0.051) high enough to be mistaken for diamond, yet it is anisotropic (a high birefringence of 0.105–0.135) and soft (hardness 5.5).

  7. How Van Cleef & Arpels Turned an Epic Adventure Into High Jewelry

    www.aol.com/lifestyle/van-cleef-arpels-turned...

    Here is the basic plot of Robert Louis Stevenson’s Treasure Island, in case you need a refresher: A boy named Jim Hawkins discovers a map leading to lost treasure and sets off with friends to ...

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