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  • Koshka

    Alexandrite, June birthstone (green in daylight, raspberry under fluorescent)

  • Seph G

    Alexandrite Cushion, 26.75 cts. Bluish green in daylight and purple red under incandescent light, alexandrites this large are extremely rare. Photographed by David Weinberg for Alexandrite.net and released to the public domain. “Alexandrite from the Ural Mountains in Russia is green by daylight and red by incandescent light. Other varieties of alexandrite may be yellowish or pink in daylight and a columbine or raspberry red by incandescent light.” ~ http://en.wikipedia.org/wiki/Chrysoberyl

  • Dragonrat Jewellery

    Alexandrite is renowned for its strange optical properties – it can actually undergo dramatic shifts in color depending on what kind of light it's in. To be clear: this color change is independent of your viewing angle; a gemstone that shifts colors when you rotate it in your hand is said to be pleochroic, and while alexandrite is strongly pleochroic, it can also change colors independently of viewing angle when viewed under an artificial light source. (In natural sunlight, the gem appears greenish blue; in soft incandescent light, the gem appears reddish purple, instead.) A variety of Chrysoberyl, alexandrite belongs to the same family of gemstones as emerald. It's color-changing properties (and its scarcity relative to diamond) is due to an exceedingly rare combination of minerals that includes titanium, iron and chromium. [Photo Credit: David Weinberg | CC BY-SA 3.0]

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