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  2. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    Blue-violet National Museum of Natural History, Washington [9] Star of Bombay: Sri Lanka 182 carats (36.4 g) Star Blue-violet National Museum of Natural History, Washington [10] Ruspoli Sapphire: 136.9 carats (27.38 g) [11] Stuart Sapphire: Sri Lanka 104 carats (20.8 g) Blue Tower of London [12] Bismarck Sapphire: Myanmar: 98.56 carats (19.712 ...

  3. Millennium Sapphire - Wikipedia

    en.wikipedia.org/wiki/Millennium_Sapphire

    The Millennium Sapphire is a blue sapphire discovered in 1995 in Madagascar, the natural darkblue gem weighed 89,850 carats (nearly 40 pounds, or 17.97 kilograms). The Millennium Sapphire History

  4. Ruspoli Sapphire - Wikipedia

    en.wikipedia.org/wiki/Ruspoli_Sapphire

    The Ruspoli Sapphire, also known as the Wooden Spoon Seller's Sapphire, is a 136.9 carat (27.38 g) blue sapphire that has historically been confused with Grand Sapphire of Louis XIV (which has also been called the Ruspoli Sapphire or Wooden Spoon Seller's Sapphire). Recent research has shown that not only are these two separate gems, but also ...

  5. Hierarchy of precious substances - Wikipedia

    en.wikipedia.org/wiki/Hierarchy_of_precious...

    Wedding anniversaries extend the jubilee hierarchy with various sequences of substances filling in many of the gaps between the same major milestones. In 2017 the 65th anniversary of the accession of Elizabeth II was widely referred to as her "sapphire jubilee" or more specifically as her blue sapphire jubilee (see Sapphire Jubilee of Queen Elizabeth II) [1] but more traditionally the sapphire ...

  6. Yogo sapphire - Wikipedia

    en.wikipedia.org/wiki/Yogo_sapphire

    The sapphire bearing Yogo dike is a dark gray to green intrusive rock known as a lamprophyre. The lamprophyre is an unusual igneous rock that contains a low content of silica . The rock has a porphyritic texture with large crystals of orthopyroxene and phlogopite set in a fine grained matrix .

  7. Sapphire (color) - Wikipedia

    en.wikipedia.org/wiki/Sapphire_(color)

    The 423-carat (85 g) blue Logan Sapphire. Sapphire is a saturated shade of blue, referring to the gemstone of the same name. Sapphire gems most commonly occur in a range of blue shades, although they can come in many different colors. Other names for variations of the color sapphire are blue sapphire or sapphire blue, shown below.

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