3.30 Ct. Multi Color Crystal Opal (Jelly Opal) from Australia

This offering from The Natural Gemstone Company is a precisely documented Crystal Opal, Jelly Opal, marquise form weighing 3.30 carats, with exact dimensions of 17.62 x 8.83 x 3.65 mm. The piece exhibits a tablet cutting style executed to marquise outline, yielding a shallow crown and a thin pavilion profile optimized for translucency and color transmission. Clarity is graded as very slightly included, evaluated at eye level, indicating only minor internal irregularities that do not detract from overall visual performance. Color intensity is classified as intense, and the surface finish is an excellent polish reflecting a clean, vitreous sheen. Enhancement status is none, the material is natural and untreated, and geographic origin is Australia, a provenance consistent with high quality crystal opal formation.

Optical behavior is dominated by a strong play of color across a translucent jelly body. The opal displays a multi color palette, with predominant cool tones including vivid blues and greens, accompanied by intermittent flashes of warmer yellow and subtle red in select viewing angles. The tablet cut enhances this optical display by maintaining minimal thickness above the color layer, allowing incident light to interact efficiently with the stacked silica sphere lattice that generates diffraction color. The translucency of the specimen permits light transmission through the body, producing an inner glow rather than surface only reflections, and the intense color grade denotes high chroma and saturation of the diffracted wavelengths. Directionality of play is moderate, yielding broad flashes along the long axis of the marquise, which creates dynamic color movement when the stone is tilted in mounted jewelry.

From a lapidary and gemological standpoint, the tablet marquise combines specific craftsmanship choices to maximize optical return while maintaining structural integrity. The cutter preserved sufficient thickness, 3.65 mm, to stabilize the opal against mechanical stress, while fashioning a thin tablet crown to maximize color visibility. The marquise outline is symmetrically executed, with well aligned terminations and proportional shoulders that will facilitate secure bezel or prong settings. Polish quality is excellent, indicating meticulous final polishing with fine abrasives to eliminate surface-bearing scratches and to enhance light transmission. The very slightly included clarity at eye level suggests small internal fractures or potch inclusions were managed during cutting to avoid disruption of the color play. No filling or resin stabilization has been applied, therefore the surface and internal characteristics are entirely natural, which is of particular relevance to technical buyers who value untreated provenance.

For practical use and setting recommendations, this 3.30 carat marquise tablet crystal opal is best oriented in jewelry to present its long axis horizontally on the finger or pendant, which aligns the principal color flashes with natural movement and viewing planes. A low profile bezel with protective shoulders is advisable to minimize edge exposure, or a secure prong setting with four well placed claws designed to cradle the long axis may be employed for a lighter visual border. Given opal material properties, including a Mohs hardness near five and a half to six and a half, and the hydrated silica microstructure that can be sensitive to rapid thermal or chemical changes, avoid ultrasonic cleaners and extreme heat during fabrication. Routine care involves gentle cleaning with mild soap and water and drying at room temperature. For collectors and designers seeking technical certainty, this gemstone is accompanied by The Natural Gemstone Company documentation confirming weight, dimensions, cut description, clarity assessment, color intensity, absence of enhancement, and Australian origin, enabling confident technical evaluation and seamless integration into bespoke pieces.