1.68 Ct. Multi Color Cabochon White Opal (Light Opal) from Australia

This listing describes a single, translucent White Opal, also identified in the trade as a Light Opal, weighing 1.68 carat, with dimensions 9.40 by 9.15 by 3.19 mm, cut in a cabochon style. The gemstone presents a fancy, slightly asymmetric outline typical of hand shaped material, and it originates from Australia, a locality renowned for quality white opals. Clarity is graded as very slightly included, evaluated at eye level, and the color intensity is classified as light, which permits broad, even transmission of light through the body. The polish is excellent, indicating a high degree of lapidary finish on both the dome and the pavilion rim. No enhancement has been applied to this specimen, and the piece is supplied and warranted by The Natural Gemstone Company as a natural, solid opal, not a doublet or triplet, and not subjected to dyes or resins.

From the perspective of cutting and optical performance, the cabochon profile has been executed to balance surface area and dome height, maximizing play of color while maintaining structural thickness. With a maximum diameter close to 9.40 mm and a crown height of 3.19 mm, the dome to diameter ratio is approximately 0.34, a moderate dome that favors diffuse flashes rather than narrow, pinpoint color zones. The cutter has centered the dome apex to maintain symmetrical light return across the face, and the edge blending toward the girdle is smooth, which reduces facet shadowing and optimizes wearer comfort in bezel settings. The excellent polish promotes minimal surface scattering, allowing the opal to exhibit multi color flashes, with red and green components visible under standard lighting. The light body tone allows internal color diffraction to read as soft broad flashes across the field, rather than as a deeply saturated play that would obscure inclusions.

Inclusions in this White Opal are described as very slight, and they function as unique internal signatures that contribute directly to provenance and authenticity. Typical inclusion types observed in light opal of Australian origin include thin bedding planes of potch, fine sand or ironstone specks, hairline healed fissures, and subtle colorless veils related to growth zoning. These features are not defects in the sense of laboratory treatments, but are instead part of the opalization process, where silica rich solutions filled interstices in host rock and subsequently consolidated into a hydrated amorphous silica lattice. The spatial arrangement and morphology of potch patches and micro inclusions can mirror the stratigraphic environment of formation, and therefore they act as microscopic fingerprints for experienced gemmologists. In this specimen, the very slightly included grade means that under unaided eye inspection the inclusions are minimal and do not detract from the overall visual appeal. Under low power magnification the inclusions provide reliable evidence of a solid natural opal, supporting the declaration of no enhancement.

For application and care, this White Opal should be considered with its physical properties in mind. Opal commonly has a Mohs hardness in the 5.5 to 6.5 range and is hygroscopic to a degree, so abrupt thermal shock and prolonged exposure to solvents should be avoided. The cabochon cut and the excellent polish contribute to resistance against surface abrasion, and the moderate dome height provides a conservative thickness that is suitable for bezel set rings, pendants, and brooches, where the setting can offer mechanical protection. Because no enhancement has been applied, the stone will not have a stabilizing resin layer that could be compromised by ultrasonic cleaning or steam. For longevity we recommend professional cleaning with mild, warm soapy water and a soft brush, and secure bezel or semi bezel settings to protect the lower girdle where opal is most vulnerable. The Natural Gemstone Company stands behind the description and origin of this piece, and we provide detailed imagery and measurements to assist connoisseurs and lapidary professionals in evaluating mountability and design integration. This piece is well suited to designers and collectors who prioritize natural internal character, precise lapidary technique, and documented, untreated origin.