Mokume Gane 18kt Yellow Gold Montana Sapphire and Spinel ‘Undras’ Ring

I hand-fabricated the Undras ring using Mokume Gane laminate of 24-layer 18kt yellow gold and sterling silver backed with an additional .6mm thick layer of sterling silver. The ring features an intense round teal Montana sapphire, 0.75ct, 5mm and a luscious candy purple modified round spinel, 0.14ct, 3.5mm. The bezels are both 18kt yellow gold. The ring is roughly 7.7mm wide and the band is approximately 1.2mm thick; 4mm deep at the teal sapphire.

Size 6.5 is available.

*This ring can be sized down or up from about a size 5 up to 9.

Just let me know what size you need in the ‘notes’ section during checkout.

I faceted the teal Montana sapphire in a standard round brilliant cut out of rough I acquired from Debbie and Neal Hurni at Lewis & Clark Sapphires, Eldorado Bar in 2020. I faceted the purple spinel in a modified round brilliant out of Vietnamese rough in 2020. Both gems are natural and untreated (no heat).


1 in stock

  • Materials and Sizes

    Additional information


    18K Yellow Gold, Sterling Silver


    Mokumé Gane




    Sapphire, spinel

  • Ask Us a Question

    Ask Us a Question

    Fill out the form below with your question and we will respond as soon as possible. Thank you.

    • Caring for Your Jewelry

      Caring for Your Jewelry



      To prolong the life of your fine jewelry and protect it from damage, we recommend the following care:

      Activities to Avoid While Wearing Your Jewelry:

      The following activities will expedite the speed of oxidation of your jewelry, and potentially cause damage, especially to stones. Therefore, it is recommended that you do not wear your jewelry while:

      • Swimming;
      • Using cleaning chemicals;
      • Applying lotions and perfumes;
      • Lifting heavy objects (e.g. lifting free weights, carrying metal furniture, yard work, etc.);
      • Washing dishes;
      • Engaging in any activity that results in a sustained amount of time in water;
      • Engaging in any activity with potential damage to the hands, such as rock climbing, auto repair, construction, etc.

      Recommended Cleaning of Your Jewelry:

      • Use a mild, non-abrasive soap and warm water.
      • For particularly dirty jewelry, gently clean using a soft toothbrush with mild soap and water.
      • You can remove tarnish from silver on the inside of a ring with a silver or general jewelry polishing cloth. (NOTE: if you use a polishing cloth on the patterned Mokumé surfaces, the polish may temporarily make the pattern difficult to see. The pattern should return as the metals oxidize in reaction to the environment.)
      • If a polished stone inlay has become dull, you may want to return it to us for re-finishing.
    • Ring Fitting

      Ring Fitting

      We highly recommend visiting at least two to three reputable jewelers to have your finger sized. They should use standard fit sizers, and they should agree on the size. It is also important to tell the jewelers how wide your ring will be since width is a determining factor in sizing.

      Meteorite rings and rings with inlay cannot be re-sized.

    • About Mokumé Gane

      About Mokumé Gane

      What is Mokume?

      Translated from Japanese, Mokume Gane means wood eye metal. It is a layered metal that is used to make jewelry and other fine crafts. It was first developed by Denbei Shoami, a Japanese master metalsmith, for use as decoration on sword hilts and handles.

      Read more…

    • Options for Special Orders

      Options for Special Orders

      A special order based on this design can be created. Special order pieces can be made in most metals, and the inlay, center stone, and accent stones (if applicable) can be modified based on your preferences in most cases. Please contact us for more information using the “Ask us a Question” form on this page.

      Special order delivery time is 4-6 weeks. Rush deliveries are available for an additional fee. Engraving is available upon request and ranges in price from $15-$30.

      Every piece is handmade. Variations will occur.

      For a completely custom design, please visit our Custom Designs page.

    • About Mokumé Gane Laminate

      About Mokumé Gane Laminate

      My normal Mokumé Gane sheet is 1.5mm to 1.6mm thick and when part of a ring or pendant is often soldered to a .41mm thick piece of backing metal, anything from stainless steel to 18kt gold. The laminate uses about half as much Mokumé for the same suface area. I use an approximately .5mm to .75mm thick piece of Mokumé and fuse or solder it to a .75mm to 1mm thick piece of backing metal.