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  2. Rutile - Wikipedia

    en.wikipedia.org/wiki/Rutile

    Rutile is an oxide mineral composed of titanium dioxide (TiO 2), the most common natural form of TiO 2.Rarer polymorphs of TiO 2 are known, including anatase, akaogiite, and brookite.

  3. Rutilated quartz - Wikipedia

    en.wikipedia.org/wiki/Rutilated_quartz

    Rutilated quartz is a variety of quartz which contains acicular (needle-like) inclusions of rutile. [1] It is used for gemstones. These inclusions mostly look golden, but they also can appear silver, copper red or black.

  4. Category:Trigonal minerals - Wikipedia

    en.wikipedia.org/wiki/Category:Trigonal_minerals

    This page was last edited on 19 October 2021, at 20:01 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  5. Corundum - Wikipedia

    en.wikipedia.org/wiki/Corundum

    Corundum is a crystalline form of aluminium oxide (Al 2 O 3) typically containing traces of iron, titanium, vanadium, and chromium. [3] [4] It is a rock-forming mineral.It is a naturally transparent material, but can have different colors depending on the presence of transition metal impurities in its crystalline structure. [7]

  6. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    Rutilated quartz is a popular type of quartz containing needle-like inclusions. Ruby Rubies are known for their intense red colour and are among the most highly valued precious gemstones. Rubies have been treasured for millennia. In Sanskrit, the word for ruby is ratnaraj, meaning king of precious stones. Sapphire

  7. Vasily Konovalenko - Wikipedia

    en.wikipedia.org/wiki/Vasily_Konovalenko

    Materials: Beloretsk quartz, rutilated quartz, obsidian, tiger eye, agate, lapis lazuli, ruby, petrified wood, jasper, gold, silver, labradorite, serdolic agate and nundoorite. Height 24 cm. [1]: 102 •In the Sultry Afternoon I: An obese man gorges on watermelon while enjoying a cool soak on a hot afternoon.

  8. List of rubies by size - Wikipedia

    en.wikipedia.org/wiki/List_of_rubies_by_size

    A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide).Other varieties of gem-quality corundum are called sapphires.Ruby is one of the traditional cardinal gems, together with amethyst, sapphire, emerald, and diamond. [1]

  9. Ruby - Wikipedia

    en.wikipedia.org/wiki/Ruby

    Ruby is a pinkish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). 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. [3]

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