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  2. Tourmaline - Wikipedia

    en.wikipedia.org/wiki/Tourmaline

    For example, blue indicolite tourmaline is the only blue gemstone of any kind that will show a drag response when a neodymium magnet is applied. Any blue tourmaline that is diamagnetic can be identified as paraiba tourmaline colored by copper in contrast to magnetic blue tourmaline colored by iron. [22]

  3. Pleochroism - Wikipedia

    en.wikipedia.org/wiki/Pleochroism

    Pleochroism of cordierite shown by rotating a polarizing filter on the lens of the camera Pleochroism of tourmaline shown by rotating a polarizing filter on the lens of the camera Pleochroism is an optical phenomenon in which a substance has different colors when observed at different angles, especially with polarized light.

  4. Elbaite - Wikipedia

    en.wikipedia.org/wiki/Elbaite

    Light blue to bluish green: Brazilian indicolite variety (from indigo) Green: Brazilian verdelite variety (from emerald) Watermelon tourmaline is a zoned variety with a reddish center surrounded by a green outer zone resembling watermelon rind, evident in cross-sectional slices of prisms, often displaying curved sides.

  5. Move over diamonds, these little-known gemstones are heating up

    www.aol.com/move-over-diamonds-little-known...

    Experts posit that only one Paraiba tourmaline is mined for every 10,000 diamonds — and while similar hues are found in Madagascar, the scarcity of Brazilian stones has seen prices soar.

  6. Gemstone Meanings: Power and Significance of the 25 Most ...

    www.aol.com/gemstone-meanings-power-significance...

    Emeralds and other green gemstones like tourmaline, peridot, and jade correlate to the green color wavelength and heart chakra, so wearing stones of such color can amplify one’s heartfelt ...

  7. List of minerals - Wikipedia

    en.wikipedia.org/wiki/List_of_minerals

    Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...

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