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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. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Nevertheless, diamonds, rubies, sapphires, and emeralds still have a reputation that exceeds those of other gemstones. [ 26 ] Rare or unusual gemstones, generally understood to include those gemstones which occur so infrequently in gem quality that they are scarcely known except to connoisseurs, include andalusite , axinite , cassiterite ...

  4. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    Sapphires are a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide (α-Al 2 O 3) with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.

  5. Yogo sapphire - Wikipedia

    en.wikipedia.org/wiki/Yogo_sapphire

    "Yogo sapphire" is the preferred term for gems found in the Yogo Gulch, whereas "Montana sapphire" generally refers to gems found in other Montana locations. [18] More gem-quality sapphires are produced in Montana than anywhere else in North America. [18] Montana sapphires come in a variety of colors, though rubies are rare. [16] [18] [23]

  6. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    Sapphire 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 ...

  7. Portal:Minerals - Wikipedia

    en.wikipedia.org/wiki/Portal:Minerals

    Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. The word ruby comes from ruber, Latin for red. The color of a ruby is due to the element chromium.

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