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  2. Tourmaline - Wikipedia

    en.wikipedia.org/wiki/Tourmaline

    Today this tourmaline locality (type locality for dravite) at Dobrova (near Dravograd), is a part of the Republic of Slovenia. [9] Tschermak gave this tourmaline the name dravite, for the Drava river area, which is the district along the Drava River (in German: Drau, in Latin: Drave) in Austria and Slovenia.

  3. Birefringence - Wikipedia

    en.wikipedia.org/wiki/Birefringence

    Birefringence is responsible for the phenomenon of double refraction whereby a ray of light, ... tourmaline (complex silicate) Trigonal: 1.669: 1.638: −0.031 zircon ...

  4. Glass-ceramic - Wikipedia

    en.wikipedia.org/wiki/Glass-ceramic

    Macor is a white, odorless, porcelain-like glass ceramic material and was developed originally to minimize heat transfer during crewed spaceflight by Corning Inc. [18] StellaShine, launched in 2016 by Nippon Electric Glass Co., is a heat-resistant, glass-ceramic material with a thermal shock resistance of up to 800 degrees Celsius. [19]

  5. Porcelain vs. Ceramic: How to Choose the Right Tile for Your ...

    www.aol.com/news/porcelain-vs-ceramic-choose...

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  6. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Paraiba Tourmaline has become one of the most popular gemstones in recent times thanks to its color and is considered to be one of the important gemstones after rubies, emeralds, and sapphires according to Gübelin Gemlab. Even though it is a tourmaline, Paraiba Tourmaline is one of the most expensive gemstones. [31]

  7. Diopside - Wikipedia

    en.wikipedia.org/wiki/Diopside

    Diopside based ceramics and glass-ceramics have potential applications in various technological areas. A diopside based glass-ceramic named 'silceram' was produced by scientists from Imperial College, UK during the 1980s from blast furnace slag and other waste products. They also produced glass-ceramic is a potential structural material.

  8. Apple dodged a DeepSeek sell-off, but its China headache hasn ...

    www.aol.com/apple-dodged-deepseek-sell-off...

    Apple avoided a hit to its share price from DeepSeek, but it has another China-made problem. iPhone sales in the country have fallen again. An 11% slide in sales last quarter is raising concerns ...

  9. Vitrified tile - Wikipedia

    en.wikipedia.org/wiki/Vitrified_tile

    Vitrified tile is a ceramic tile with very low porosity. [1] It is an alternative to marble and granite flooring. Vitrified tiles are often used outdoors due to their water and frost resistance. There are four types of Vitrified tiles - Soluble salt, Double charge, Full Body, and Glazed.

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