0.73 Ct. Yellowish Brown Sapphire from Ceylon (Sri Lanka)

This listing presents a transparent 0.73 carat princess shape yellowish brown sapphire from Ceylon, with exact dimensions 4.93 by 4.88 by 3.38 millimeters, faceted in a square princess cut. The gem exhibits a medium color intensity in a yellowish brown hue, and it has been heat treated, which is a widely accepted enhancement for sapphires to stabilize and refine color and clarity. Clarity is graded as very slightly included at eye level, indicating minimal, localized inclusions that do not materially affect transparency or light return under standard viewing. The finish is described as excellent polish, with crisp facet junctions and a smooth girdle profile, consistent with high level lapidary workmanship. Origin is Ceylon, Sri Lanka, which is known for producing sapphires with lively tone and a characteristic lustre that interacts attractively with modified brilliant faceting styles.

From a cutting and optical performance perspective, the princess facet architecture on this example is optimized to balance color retention and brilliance. The modified brilliant pavilion facets converge to form an X pattern when viewed through the table, a hallmark of well executed princess cutting that promotes aggressive light return and scintillation. Measured proportions yield a depth of approximately 68.9 percent based on the mean of the length and width, which sits within the expected range for princess cuts where a slightly deeper pavilion helps preserve color saturation in lighter tone material. The crown and bezel facets display controlled angles that avoid excessive windowing or extinction, and the facet symmetry supports even scintillation across the table and corners. Optical properties consistent with corundum apply here, including refractive indices in the range typically observed for sapphire, and low but measurable birefringence, which in combination with the cut can produce gentle pleochroic shifts between warmer yellow and cooler brown tones under different lighting orientations.

The combination of a 0.73 carat weight, square princess outline, and yellowish brown color from a Ceylon source renders this stone comparatively rare in the market. Yellow and brown tones in sapphire are more often encountered in rounded or step cut shapes for yield efficiency, and larger sizes with uniform medium intensity in a square princess configuration are uncommon. Many yellow and brown sapphires at this scale are sold as small melee or are cut to maximize weight rather than optical performance, which can result in uneven color or windowing. By contrast, this specimen demonstrates an even color distribution and optical design that preserves medium intensity without sacrificing brilliance. The presence of only very slight inclusions at eye level further elevates its desirability, since heat treatment has improved the overall clarity while retaining natural origin characteristics attributable to Ceylon material. For connoisseurs who compare sapphire offerings by both precise proportions and optical behavior, this piece stands out for delivering balanced saturation and lively return in a precise, square princess form.

From a setting and design standpoint, the technical attributes of this stone inform recommended mounting choices. The square princess outline with slightly deeper pavilion depth benefits from a setting that secures the girdle at four corners or employs a custom bezel that follows the squared silhouette, to protect the corners while allowing the table and crown facets to interact freely with incident light. The excellent polish and facet symmetry make this sapphire well suited as an elegant center in fine jewelry, including solitaire rings, bezel set pendants, and minimalist stud settings that emphasize square geometry. For collectors and designers the Ceylon origin and documented heat treatment status provide assurance regarding provenance and standard enhancement practice, while the specific gravity and refractive characteristics of corundum ensure durable everyday wear. The Natural Sapphire Company presents this princess shape yellowish brown sapphire as a technical and aesthetic rarity, a gem that merges precise lapidary technique with a color range and size that are infrequently found together, and we invite detailed inquiries for custom mounting and certification options.