11.40 Ct. Boulder Opal from Australia

I am pleased to present a stunning natural Boulder Opal offered by The Natural Gemstone Company, a translucent freeform gem weighing 11.40 carat with measurements of 35.50 x 8.40 x 4.30 mm, a piece that highlights the best of Australian origin and artisan cutting. This freeform shape allows the opal to display a sweeping play of color across its surface, and despite having a cut listed as n a the stone has been shaped to maximize the vibrant color flash. Clarity is graded very slightly included evaluated at eye level which means the gem shows only minor natural inclusions that do not detract from its beauty. Color intensity is intense and the polish is excellent, creating a reflective surface that brings out deep electric blues and bright greens together with flashes of violet depending on the light. Enhancement is none, so you will own an entirely natural opal as it came from the ground in Australia, showcasing authentic character and stability for its type.

As a Boulder Opal this specimen retains a thin ironstone backing in places which anchors the opal layer and helps create striking contrast that brightens the color pattern, and the piece photographs as a long slim slice with iridescent color running along the length. The translucency allows light to penetrate and then scatter in the internal silica spheres producing brilliant spectral effects when the gem is turned, and the intense color intensity means those flashes are visible even in subdued lighting. The very slightly included clarity grade evaluated at eye level reassures you that what you see is natural formation rather than treatment, and the excellent polish makes the surface smooth to the touch and ready for jewelry use. At 11.40 carat the gem has a substantial presence that will serve as a memorable center for a pendant or an artistic component for a bespoke ring or cuff, and the freeform shape lends itself to creative designs that celebrate the opal rather than forcing it into a strict traditional setting.

For practical use and styling the elongated dimensions make the stone ideal for a horizontal or vertical bezel in a pendant, or mounted in a custom ring where the ironstone backing can be used as a secure seat that complements the play of color. Because the opal is natural with no enhancement and a very slightly included clarity grade evaluated at eye level we recommend settings that protect the stone from hard knocks while allowing light to interact with the surface, such as a low but generous bezel or a protective halo that reduces edge exposure. Cleaning is simple by warm water and a soft cloth, do not use steam or ultrasonic cleaners, and avoid prolonged exposure to harsh chemicals or extreme temperature swings. At The Natural Gemstone Company we document origin and enhancement status for each gem and we are happy to provide high resolution images and additional viewing angles on request, we can also arrange secure shipping and custom mounting services if you prefer to have the piece set before delivery. If you would like to reserve this Australian Boulder Opal or discuss bespoke setting options our team is ready to assist with measurements, design sketches, and professional recommendations to ensure the gem becomes an heirloom quality piece that you will enjoy for years.