• chrome tourmaline - dark colored gemstones


    Chrome tourmaline, like the crystal on this quartz matrix, gets its intense green color from the presence of chromium. This crystal weighs 66.65 cts. Merelani Hills, Arusha, Tanzania. © Rob Lavinsky, www.iRocks.com. Used with permission.

    Article: Advice For Grading Dark Colored Gemstones

    Credit: Rob Lavinsky, www.iRocks.com

    GemstoneTourmaline, Chrome-Tourmaline
    Natural or man madeNatural
    Gem StateSpecimen