7.75 Ct. Multi Color Boulder Opal (Ironstone Opal) from Australia

One beautiful opaque 7.75 carat fancy shape boulder opal, ironstone opal, with dimensions of 37.70 x 8.60 x 3.90 mm, presents a rich, bold color that serves as a clear symbol of personal power and distinction. This tablet cut stone is designed to maximize the visible play of color across a broad surface, and the intense color intensity combined with an excellent polish delivers striking greens, blues, and flashes of warmer tones across the ironstone matrix. As a Boulder Opal, Ironstone Opal, the opal layer remains naturally attached to its ironstone host, providing both visual contrast and mechanical stability. The tablet cutting style and the stone thickness of 3.90 mm make it particularly well suited for bespoke jewelry applications that emphasize surface brilliance, including bezel set pendants, inlay work, and minimalist mountings that highlight elongated shapes.

From a gemological perspective this specimen meets several criteria that educated buyers consider essential. The weight of 7.75 carat is substantial for a cut boulder opal of this form, and the opaque body tone with intense play of color reflects a strong, consistent diffraction pattern rather than transient patchiness. Clarity in opal grading refers less to transparency and more to the evenness of color play and absence of disruptive fractures or potch that interrupt the spectrum. This piece shows a uniform color distribution and no indications of enhancement, listed as no enhancement, which preserves both its natural rarity and long term value. Origin Australia is noted, and Australian boulder opals are highly regarded for their stable ironstone backing and enduring market demand. For practical considerations the Mohs hardness for opal typically ranges around 5.5 to 6.5, and the ironstone support here reduces susceptibility to breakage, making this a more wearable and durable choice among opal varieties. The Natural Gemstone Company offers this certified natural boulder opal with detailed measurements, cutting style, and provenance, providing full transparency for collectors and designers who seek a gem that combines geological authenticity, aesthetic power, and sound investment qualities.