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  2. Asterism (gemology) - Wikipedia

    en.wikipedia.org/wiki/Asterism_(gemology)

    Asterism on the surface of a blue star sapphire. A purple-pink star sapphire displaying asterism in a platinum ring.. An asterism (from Ancient Greek á¼€στήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone.

  3. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    Sapphire Origin Date Size Cut Color Location Ref Star of Adam: Sri Lanka 2015 1,404.49 carats (280.898 g) Star Blue Anonymous owner [3] Black Star of Queensland: Australia 1938 733 carats (146.6 g) Star Black Anonymous owner [4] Star of India: Sri Lanka 563.4 carats (112.68 g) Star Blue-gray American Museum of Natural History, New York [5]

  4. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    The 182-carat Star of Bombay, mined in Sri Lanka and located in the National Museum of Natural History in Washington, D.C., is another example of a large blue star sapphire. The value of a star sapphire depends not only on the weight of the stone, but also the body color, visibility, and intensity of the asterism.

  5. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    The most popular form of sapphire is blue sapphire, which is known for its medium to deep blue colour and strong saturation. Fancy sapphires of various colours are also available. In the United States, blue sapphire tends to be the most popular and most affordable of the three major precious gemstones (emerald, ruby, and sapphire). Turquoise

  6. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Even the same named gemstone can occur in many different colors: sapphires show different shades of blue and pink and "fancy sapphires" exhibit a whole range of other colors from yellow to orange-pink, the latter called "padparadscha sapphire". [39] This difference in color is based on the atomic structure of the stone.

  7. Star of Artaban - Wikipedia

    en.wikipedia.org/wiki/Star_of_Artaban

    The 287–carat Star of Artaban, housed in the National Museum of Natural History, Washington D.C., is an unusually large blue star sapphire. The Star of Artaban is a 287–carat cabochon-cut star sapphire currently located at the Smithsonian National Museum of Natural History. Its origin is somewhat obscure but it is believed to come from Sri ...

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