8.50 Ct. Boulder Opal from Australia

Allow me to introduce a truly special gem offered by The Natural Gemstone Company, a beautiful opaque 8.50 carat Boulder Opal presented in a graceful freeform shape. This opal measures 21.10 x 10.80 x 5.00 mm and features a tablet cut that gives the stone a low profile while maximizing the surface area of its color play. The gem shows vivid color intensity, with rich electric blue as the dominant tone and lively flashes of green and teal that shift as the stone moves. The polish is excellent, the surface finish smooth and reflective, and the piece is entirely natural with no enhancement. Originating from Australia, this specimen carries the provenance that collectors and designers prize, and the combination of a striking multi color appearance and the secure, stable presentation of a Boulder Opal makes this a versatile and collectible item.

Boulder Opal is prized for the way its precious opal material remains attached to a thin layer of natural ironstone matrix, creating a naturally durable backing that emphasizes color while providing strength for wearable designs. In this specimen the opal layer is presented in an attractive tablet cut, which highlights broad, uninterrupted color bands rather than narrow pinfire of color. The freeform outline adds uniqueness and makes each viewing angle different, because the veins and patches of color flow across the surface in a way that cannot be duplicated by a symmetrical cut. Designers will appreciate the 21.10 millimeter length because it reads well as a pendant focal point, and the 5.00 millimeter thickness provides enough depth for secure settings while keeping the overall profile comfortable for everyday wear. For collectors who favor natural, untreated gemstones, the declaration that there are no enhancements adds value and peace of mind.

When planning a setting or caring for the stone, there are practical recommendations that preserve the beauty and longevity of a Boulder Opal. Bezel settings are an excellent choice because they protect the delicate edges and maintain the tablet cut profile, and a low bezel can also accentuate the dramatic color without adding bulk. If you prefer a prong style, choose secure prongs and consider a protective halo or partial bezel to reinforce the perimeter. For metal pairings, warm metals like yellow gold enhance the blue green contrasts with a classic look, while white gold or platinum create a modern canvas that lets the vivid colors pop. Care is straightforward but important. Clean the opal with warm water and a mild soap using a soft brush or cloth, rinse thoroughly and dry immediately. Avoid harsh chemicals, prolonged exposure to water and heat, and do not use ultrasonic cleaners or steam machines, because sudden temperature changes or extreme vibration can damage delicate internal structures. Stored flat in a soft pouch and kept separate from harder gems will prevent surface scratches and preserve the excellent polish.

This Boulder Opal from Australia is a standout piece within our natural gemstone inventory and it reflects The Natural Gemstone Company commitment to offering ethically sourced, high quality specimens with clear disclosure. Its multi color play and vivid intensity create a dramatic centerpiece for a custom jewelry commission or a discerning collection, and because the stone has not been treated it appeals to buyers who value natural authenticity. If you would like assistance choosing a setting, an appraisal, or information about custom design options, our team is available to provide personalized guidance. We can discuss setting styles, metal choices, and secure delivery options, and we are pleased to share detailed photographs and viewing suggestions so you can see how the color reacts under different lighting conditions. This Boulder Opal is a rare opportunity to own a naturally vivid, well cut, and well polished opal, and we at The Natural Gemstone Company are here to help you bring it into the perfect design.