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  2. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    Synthetic sapphire—also referred to as sapphire glass—is commonly used for small windows, because it is both highly transparent to wavelengths of light between 150 nm and 5500 nm (the visible spectrum extends about 380 nm to 750 nm [57]), and extraordinarily scratch-resistant. [58] [59] The key benefits of sapphire windows are:

  3. Gemstones in the Bible - Wikipedia

    en.wikipedia.org/wiki/Gemstones_in_the_Bible

    Sapphire Sapphire. Sapphire - Greek ὑάκινθος hyakinthos; Vulg. hyacinthus ; the eleventh stone of the foundation of the heavenly city (Revelations 21:20). The genuine sapphire is a beautiful blue hyaline corundum and is composed of nearly pure alumina, its color resulting from the presence of iron oxide. Sapphire was obtained from India.

  4. 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 ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone.

  5. Lapidary (text) - Wikipedia

    en.wikipedia.org/wiki/Lapidary_(text)

    Sapphire was the "fairest of all precious stones", and was used to block cholera, to remove ulcers in the intestines, and to prevent poisoning. ... The symbolism of ...

  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. Aaron's rod - Wikipedia

    en.wikipedia.org/wiki/Aaron's_rod

    Rabbinic midrash described attributes of Aaron's rod beyond those in the Biblical text.. It is reported that the rod was made of sapphire, weighed forty seahs (a seah = 10.70 pounds), and bore the inscription דצ״ך עד״ש באח״ב (the initials of the Hebrew names of the Ten Plagues).

  8. Tablets of Stone - Wikipedia

    en.wikipedia.org/wiki/Tablets_of_Stone

    Many Torah scholars, however, have opined that the biblical sapir was, in fact, lapis lazuli (see Exodus 24:10, lapis lazuli is a possible alternate rendering of "sapphire" the stone pavement under God's feet when the intention to craft the tablets of the covenant is disclosed Exodus 24:12). [2]

  9. Cardinal gem - Wikipedia

    en.wikipedia.org/wiki/Cardinal_gem

    The five cardinal gems. Clockwise from top: sapphire, ruby, emerald, amethyst, diamond. Cardinal gems are gemstones which have traditionally been considered precious above all others. The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity. [1]