2.51 Ct. Boulder Opal from Australia

One opaque 2.51 carat freeform shape multi color opal, measuring 14.90 x 8.11 x 3.22 mm, is presented as a tablet cut Boulder Opal from Australia. The gem displays intense color intensity and an excellent polish, with no enhancement reported. The freeform outline, slightly tapered and triangular in profile, is typical of tablet cuts where the body is kept relatively flat to preserve the opal seam and maximize the play of color. As a Boulder Opal the material incorporates a natural ironstone backing in parts of the profile, providing both visual contrast and structural support. The weight and dimensions combine to produce a gem that is substantial enough for use as a primary focal stone in small to medium sized jewellery settings, while the 3.22 mm thickness maintains a balance between color display and practical wearability.

Under close viewing the stone exhibits a rich mix of hues across the surface, with dominant green and blue flashes interspersed with secondary tones that may include occasional aqua and teal variations. The patterning is broad and patchy rather than micro speckled, which contributes to a vivid and immediate color response when the stone is tilted under light. The tablet cut concentrates the opal layer toward the surface, enhancing the saturation and making the play of color visible from multiple angles. The excellent polish provides a high gloss finish that minimises light scattering from surface irregularities, allowing the internal color structure to read clearly. Because this opal is described as opaque, light transmission is limited and the visual experience relies principally on surface reflection and internal diffraction of light rather than on translucency.

From a gemological and practical perspective, Boulder Opal has particular considerations for cutting, setting and care. The ironstone matrix that often accompanies this type of opal increases toughness compared with thinner, non backed specimens, nevertheless opal in general is softer than many traditional gem materials and requires protection from hard knocks and abrasive wear. The tablet cut reduces the risk associated with thin, free edges, but settings that fully secure the perimeter, such as bezels or channel inlay, are recommended to protect the stone during regular use. Avoiding exposure to harsh chemicals, prolonged direct heat, and ultrasonic cleaners will preserve the polish and color intensity. Routine cleaning with a soft cloth and mild soapy water is appropriate, followed by gentle drying with a lint free cloth.

This piece is offered by The Natural Gemstone Company as a natural, untreated Boulder Opal originating in Australia, accompanied by the attributes listed, including the exact weight, dimensions, cut type, color assessment, polish grade, and enhancement status. The combination of intense color, freeform tablet profile and robust ironstone backing makes it suitable for use as a pendant centre, an accent in a custom ring with protective bezel work, or in fine inlay where the natural shape can be retained to emphasize the stone character. For designers and private collectors seeking a distinct, naturally coloured Australian opal with clear documentation of its physical characteristics, this specimen provides a reliable and well described option. Additional imaging under different lighting conditions and orientation recommendations are available on request to aid in design planning and setting selection.