• chrome tourmaline - dark colored gemstones

    Tourmaline – Natural, Specimen, Green

    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