1.48 Ct. Multi Color White Opal (Light Opal) from Australia

Presented by The Natural Gemstone Company, this specimen is a 1.48 carat marquise shape White Opal, Light Opal, rendered in a tablet cut with finished dimensions of 14.00 by 7.18 by 2.42 millimeters. The marquise outline is executed with precise symmetry, the longitudinal axis aligned to maximize the visual corridor of play of color that is characteristic of Australian light opal. The tablet cutting style produces a low profile, slightly domed platform that preserves the thin cross section while providing an even viewing plane. The stone is translucent in body, the base color a cool milky white that serves as an ideal background for multi color diffraction. No enhancement has been applied, the material is natural and untreated, and the place of origin has been verified as Australia.

Optical performance is characterized by intense color intensity, the term applied here to denote strongly saturated flashes of green, orange, and red across the field, visible without magnification under standard lighting. The play of color exhibits relatively broad flash elements and some pinfire micro patterning, creating a mixture of larger flares and finer scintillation as the viewing angle changes. The tablet configuration and the 2.42 millimeter thickness act together to produce a floating effect where color patches appear to sit near the surface rather than deeply embedded, enhancing apparent brightness under direct and oblique illumination. Clarity is graded eye clean at standard eye level evaluation, meaning no inclusions detract from performance without magnification. Surface quality is described as excellent polish, indicating a final lap finish that yields minimal microroughness and optimal light transmission.

From a lapidary and craftsmanship perspective, the tablet marquise requires a different approach than a full cabochon. Cutting begins with careful orientation of the rough to align the silica layering responsible for diffraction, then proceeds to establish the marquise outline with controlled sawing and grinding. Abrasive sequences utilize progressively finer silicon carbide and diamond wheels to shape the keel and the gentle lateral slopes, avoiding high pressure or heat that can induce crazing in hydrated silica. Final smoothing and polish are achieved with fine diamond pastes and a cerium oxide or tin oxide lap, applied with low down force to produce the excellent polish noted in the report. The cutter preserved an even pavilion thickness to maintain mechanical stability, and the tablet strategy maximizes surface area of play of color while reducing overall material depth, a trade off well executed in this piece.

For the informed buyer considering setting and long term care, several practical points should be emphasized. The 2.42 millimeter thickness classifies this tablet marquise as a thin profile, therefore protective settings such as a full bezel or partially enclosed gallery are recommended to shield the periphery from impact and to support the keel. Prong settings may be used if executed by a jeweler experienced in thin opal fixation, with prongs placed away from the table surface to avoid stress concentration. Avoid ultrasonic cleaning and steam, use only mild detergent and a soft brush with warm water, and store the opal in a stable humidity environment to reduce the risk of dehydration and crazing common to hydrated opal. The Australian origin and lack of enhancement contribute to the gemological and market value, and The Natural Gemstone Company can provide provenance documentation and bespoke mounting services to assist in translating this technical beauty into a wearable piece.