8.01 Ct. Boulder Opal from Australia

Presenting a striking Australian Boulder Opal, an opaque multi color gem weighing 8.01 carat, cut in a graceful trillion shape, with precise dimensions of 21.60 x 10.70 x 4.20 mm, finished in a tablet cut that emphasizes its broad face, offering intense color intensity and an excellent polish, no enhancement, from The Natural Gemstone Company. This stone is a true representation of genuine Australian opal character, with depth of tone and a compact profile that makes it ideal for custom jewelry design. The tablet cut creates a flat, broad surface for the play of color to be fully appreciated, and the trillion outline gives designers a modern triangular silhouette that retains a soft, wearable edge.

Viewed in hand or under light, this Boulder Opal displays a mesmerizing interplay of blues and greens, with flashes of teal and aqua that shift and stream across the tablet surface as the gem is turned. The opal layers appear as bands and ribbons, creating a landscape effect reminiscent of ocean waves and coastal horizons. Because this is a Boulder Opal, you can notice the ironstone backing that provides natural stability and enhances the contrast of the colors, making the blues appear deeper and the greens more vivid. The intense color intensity means that the gem presents a brilliant optical performance even in indoor lighting, and the excellent polish ensures a smooth touch and a high luster that complements both white and yellow precious metals.

From a geological perspective this Boulder Opal originates in Australia, where opal forms in seams and pockets within ironstone host rock, resulting in a natural backing that is part of the gem itself. Boulder Opals are prized for their durability compared with other opal varieties because the ironstone matrix gives structural support, allowing cutters to create thinner tablet cuts while maintaining strength. The tablet cut used on this piece highlights the opal color without removing the protective backing, which preserves the stone integrity. No enhancement has been applied to this gem, so what you see is the natural play of color, clarity and surface finish achieved by careful cutting and polishing. For craftsmanship this stone works wonderfully as a centerpiece for rings, pendants, and statement earrings, and it is especially suited to bezel settings where the ironstone base can be framed and protected.

Caring for a Boulder Opal is straightforward given its natural backing, however basic precautions will keep the stone looking its best, avoid sudden extreme temperature changes, clean with a soft cloth and mild soapy water, and remove jewelry during heavy manual work to prevent knocks. At The Natural Gemstone Company we stand behind every gem we offer, and this Boulder Opal comes from a reputable Australian source with full disclosure of origin and enhancement status. Our team can assist with setting ideas, metal options, and bespoke mounting designs to showcase the trillion shape and tablet cut, and we welcome inquiries about matching pairs or companion stones for a coordinated set. If you are looking for a unique, naturally brilliant opal with a contemporary shape and excellent polish, this 8.01 carat Australian Boulder Opal is a superb choice, please contact The Natural Gemstone Company for additional photographs, mounting suggestions, and shipping options.