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2. Jet (gemstone) - Wikipedia

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

   Jet (gemstone) Jet is a type of lignite, [ 1] the lowest rank of coal, and is a gemstone. Unlike many gemstones, jet is not a mineral, but is rather a mineraloid. [ 2] It is derived from wood that has changed under extreme pressure. The English noun jet derives from the French word for the same material, jaiet (modern French jais ), ultimately ...

3. Napoleon Diamond Necklace - Wikipedia

   en.wikipedia.org/wiki/Napoleon_Diamond_Necklace

   The Napoleon Diamond Necklace is somewhat atypical of other contemporary works produced by Marie-Étienne Nitot. [1] Other pieces commissioned from him by Emperor Napoleon, such as the two parures celebrating the Emperor's marriage to Archduchess Marie Louise of Austria, the Marie Louise Diadem, the wedding jewels for Empress Joséphine, etc., all demonstrate a predilection for highly ...

4. Jewels of Elizabeth II - Wikipedia

   en.wikipedia.org/wiki/Jewels_of_Elizabeth_II

   Queen Elizabeth II wearing the Queen Mary Fringe Tiara and the City of London Fringe Necklace. Elizabeth II in 1959 wearing the Vladimir tiara and the Queen Victoria Jubilee Necklace. The Queen of Australia wearing the Girls of Great Britain and Ireland Tiara in an official portrait. Elizabeth II wearing the Burmese Ruby Tiara at a state ...

5. Diamond (gemstone) - Wikipedia

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

   Diamond[ a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...

6. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including ( clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. 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 ...

7. Affair of the Diamond Necklace - Wikipedia

   en.wikipedia.org/wiki/Affair_of_the_Diamond_Necklace

   The Affair of the Diamond Necklace ( French: Affaire du collier de la reine, "Affair of the Queen's Necklace") was an incident from 1784 to 1785 at the court of King Louis XVI of France that involved his wife, Queen Marie Antoinette . The Queen's reputation, already tarnished by gossip, was further sullied by the false accusation that she had ...