My Cart


Lightning Ridge Black Opal Mini Signet Ring

Designer: RockShop

- +
  • Our signature mini signet rings feature rare gemstones. This gorgeous black opal is highly sought after, found only in Australia. This stone is from the mine in Lightning Ridge. This ring was handcrafted in St. Petersburg Florida.

    1. 18K Rose Gold 3.99g
    2. 3.8mm x 3.15mm Lightning Ridge Black Opal
    3. 1.5mm Band Width
    4. High Polish Finish
    5. Size 5.75 

    Do you need a different size?  If you need a smaller size, we offer a complimentary resize. If you need a larger size, please inquire with size via for a quote. When you're ready for checkout simply specify your desired size. We will resize the ring and ship within 7-10 business days.


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

      MINERAL: Hydrated Silica
      CHEMISTRY: SiO2•nH2O
      COLOR: All colors
      REFRACTIVE INDEX: 1.37-1.47
      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: