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

This specimen is a cushion shaped, tablet cut boulder opal, also known as ironstone opal, offered by The Natural Gemstone Company. The gem weighs 1.81 carats and measures 9.66 by 6.11 by 3.10 mm, presenting a compact, flat tablet profile that emphasizes a broad play of color. The material is opaque, with a dominant blue and green color palette visible across the polished face, and scattered variations in hue that produce a multi color appearance. The cutting style is a tablet cut, executed to present a broad, even color surface, and the polish is described as excellent, yielding a bright, reflective surface without visible abrasions. The ironstone backing remains along the pavilion edges, providing natural contrast and structural support. Color intensity is rated intense, reflecting vivid and saturated color flashes across the stone as it is viewed from different angles.

Technical and origin details are provided for accurate assessment and setting decisions. The opal is natural with no enhancement, and its origin is Australia, a well documented source for quality boulder opal material. The combination of the tablet cut and the ironstone matrix makes this stone particularly suitable for bezel settings, inlay work, or designs that benefit from a stable, backed opal surface. At 1.81 carats and the given dimensions, the gem is appropriate for rings, pendants, and artisan pieces where a flat profile is desired, and its durable ironstone support reduces the risk of breakage compared with unbacked opals. Care recommendations include avoiding harsh chemicals, ultrasonic cleaners, and extreme heat, and using a soft cloth for routine cleaning. This single, natural boulder opal is offered with full disclosure of weight, dimensions, cut, polish, enhancement status, and origin, and is available through The Natural Gemstone Company for clients and jewelers seeking a well finished Australian ironstone opal with a strong, vivid color presentation.