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  2. Asterism (gemology) - Wikipedia

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

    The archetypal asteria is the star sapphire, generally corundum with near uniform impurities which is bluish-grey and milky or opalescent, which when lit has a star of six rays. In the red instance stellate reflection is rarer; the star- ruby occasionally found with the star-sapphire in Sri Lanka is among the most valued of "fancy stones".

  3. Star sapphire - Wikipedia

    en.wikipedia.org/wiki/Star_sapphire

    Star sapphire, a type of sapphire gemstone that exhibits a star-like reflection of light (an asterism) The Armstrong Siddeley Star Sapphire, a British car manufactured from 1958 to 1960; Star Sapphire (DC Comics character), the name of several fictional supervillains in DC Comics publications; Star Sapphire, a fictional character from the ...

  4. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    A star sapphire is a type of sapphire that exhibits a star-like phenomenon known as asterism; red stones are known as "star rubies". Star sapphires contain intersecting needle-like inclusions following the underlying crystal structure that causes the appearance of a six-rayed "star"-shaped pattern when viewed with a single overhead light source.

  5. 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]

  6. Black Star sapphire - Wikipedia

    en.wikipedia.org/wiki/Black_Star_sapphire

    Black star sapphire, also known as 'natural star sapphire' is a type of corundum (aluminum oxide). It is usually cut into a dome shape to show a star feature. If it is cut with a flat or almost flat face, then a golden colour is revealed. The chemical composition and features for black star were analyzed in the Journal of Gemmology. [citation ...

  7. Star of India (gem) - Wikipedia

    en.wikipedia.org/wiki/Star_of_India_(gem)

    Star of India. The Star of India is a 563.35-carat (112.67 g) star sapphire, one of the largest such gems in the world. [1] [a] It is almost flawless and is unusual in that it has stars on both sides of the stone. The greyish-blue gem was mined in Sri Lanka [3] and is housed in the American Museum of Natural History in New York City.

  8. Verneuil method - Wikipedia

    en.wikipedia.org/wiki/Verneuil_method

    However, the Verneuil process could also be used for the production of other stones, including blue sapphire, which required oxides of iron and titanium to be used in place of chromium oxide, as well as more elaborate ones, such as star sapphires, where titania (titanium dioxide) was added and the boule was kept in the heat longer, allowing ...

  9. List of symbolic stars - Wikipedia

    en.wikipedia.org/wiki/List_of_symbolic_stars

    Star of David, or Jewish Star, a hexagram symbolizing Israel, Judeans, and/or Jews; properly speaking, this "star" is called the "Shield of David," (Magen David), while the pentagram is the "Star of David." Note that this is a cultural, rather than religious symbol. Star of Lakshmi, a Hindu symbol associated with the goddess Lakshmi

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