Black Opal Signet Ring

    Custom Order

    This piece can be recreated for you. Stones will vary slightly as each stone is one of a kind. For inquiries, email us at rockshopstpete@gmail.com. [Prices may vary depending on quality and size of stones.]

    • BIRTHSTONES & ANNIVERSARIES

      Opal is an October birthstone and the 14 year wedding anniversary.

        MINERAL: Hydrated Silica
        CHEMISTRY: SiO2•nH2O
        COLOR: All colors
        REFRACTIVE INDEX: 1.37-1.47
        BIREFRINGENCE: None
        SPECIFIC GRAVITY: 2.15 (+0.08, -0.90)
        MOHS HARDNESS: 5 to 6.5
    • If you need additional information regarding any of our gems or stones please contact us at: shop@rockshopjewelry.com