Bi-Color Tourmaline Ring *

    1. Do you need a different size?   We offer complimentary resizing. During checkout simply specify your desired size. We will resize the ring and ship within 7-10 business days.

    2. BIRTHSTONES & ANNIVERSARIES

      Tourmaline is a birthstone for October, along with opal. Tourmaline is also the gem of the 8th wedding anniversary.

        MINERAL: Tourmaline
        CHEMISTRY: Elbaite Na(Li1.5,Al1.5)Al6Si6O18(BO3)3(OH)4 Dravite NaMg3Al6Si6O18(BO3)3(OH)4 Liddicoatite Ca(Li2Al)Al6Si6O18(BO3)3(OH)3F Chromedravite NaMg3Cr6Si6O18(BO3)3(OH)4
        COLOR: All colors
        REFRACTIVE INDEX: 1.624 to 1.644
        BIREFRINGENCE: 0.018 to 0.040
        SPECIFIC GRAVITY: 3.06
        MOHS HARDNESS: 7 to 7.5
    3. If you need additional information regarding any of our gems or stones please contact us at: shop@rockshopjewelry.com