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    Alexandrite Gems

     When the sun shines, alexandrite is green. By candlelight, it’s red. How cool is that? Chatham crystals of alexandrite take months to grow. We’re thrilled to make this rare gem available for people like us who have always wanted one.

    More About Alexandrite Gems

    Alexandrite is your gem because...
    Alexandrite is your gem because...

    You love red and green

    You are born in June

    You have a creative imagination

    You have Russian heritage

    Your anniversary is in June

    Your child’s birthday is in June

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    Chatham Lab-Grown Alexandrites
    Chatham Lab-Grown Alexandrites

    Since Chatham has experience growing emerald crystals, we always wanted to try growing alexandrite crystals as well. Alexandrites are so difficult to grow that it took us several years of effort to perfect the process. Our Chatham Created Alexandrites are very close to the Russian ideal. We start with a naturally mined seed of Russian alexandrite and use a lot of chromium in the solution to make sure that the color change is dramatic.

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    The ultimate color-change gem

    A birthstone for June

    The 45th or 55th anniversary gem

    Mined in Russia, Sri Lanka and Brazil

    Named after Czar Alexander II

    A variety of chrysoberyl

    Great for engagement rings

    with an 8.5 hardness


    About Alexandrites
    About Alexandrites

    Emerald by day. Ruby by night. Alexandrites are a rare variety of the mineral chrysoberyl that changes color from bluish-green in daylight or fluorescent light to brownish or purplish red in incandescent light.

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