0.46 Ct. Bi Color / Parti Sapphire from Ceylon (Sri Lanka)

One transparent 0.46 carat round shape bi color parti sapphire is presented with precise measurements of 4.49 x 4.46 x 3.26 mm, faceted to exacting standards, and executed in a mixed brilliant cut. The stone displays a balanced profile and a pleasing table proportion, qualities that contribute to its measured optical performance. The weight and dimensions are consistent with a well centered round faceted stone, with even girdle thickness and symmetry that reflect careful preforming and cutting. The sapphire originates from Ceylon Sri Lanka, and has been heat treated to enhance color and clarity, a controlled and permanent enhancement commonly applied to sapphire material from this region. The clarity grade is noted as very very slightly included, evaluated at eye level, and the polish on all facets is excellent, producing clean facet junctions and uninterrupted mirror planes across the crown and pavilion.

The geometric faceting of this mixed brilliant cut is engineered to allow maximum light play, a design objective achieved through precise facet angles and thoughtful interplay between crown and pavilion geometry. The mixed brilliant approach combines a traditional brilliant faceting on the crown with complementary pavilion faceting that encourages internal reflection and balanced light return. Each facet plane intersects at consistent junctions, producing a coherent pattern of reflections that animate the stone as it moves under light. The round outline and radial symmetry permit even distribution of light, enabling both strong sparkle from near surface flashes and deeper scintillation from the pavilion. In this specimen, the arrangement of star and kite facets on the crown together with the pavilion facets create a visual starburst effect when viewed face up, and that structural geometry accentuates the bi color zoning by breaking and refracting light at multiple angles.

The bi color or parti nature of the sapphire introduces subtle color zoning that interacts with the faceting scheme to produce dynamic color shifts. With a light color intensity, the stone presents gentle tones that change with viewing direction and illumination, a quality that can be emphasized or subdued depending on the mounting and setting orientation. The very very slightly included grade indicates inclusions are minimal, generally not visible to the unaided eye, and therefore they do not materially detract from transparency or brilliance. The heat treatment applied is consistent with industry practice for Ceylon sapphires, and it stabilizes and refines the stone color while preserving natural character. The excellent polish ensures that facet surfaces act as efficient mirrors, enhancing both brilliance and dispersion, and contributing to a crisp, lively appearance in natural and artificial light. Combined, these attributes yield a stone that reads as bright and transparent, while offering the complexity of parti coloration.

The Natural Sapphire Company presents this sapphire as a specimen suited to refined jewelry applications where measured optical performance and provenance are valued. The compact dimensions and moderate weight make the stone suitable for delicate solitaire settings, minimalist rings, or as a finely cut accent in bespoke pieces, with the mixed brilliant cut engineered to maintain visual presence even at smaller table sizes. Given the material hardness and stability of sapphire, the stone is appropriate for daily wear when set securely, and standard gemstone care procedures will preserve polish and finish. Documentation of the gem details, including carat weight, exact measurements, cut description, clarity observation as very very slightly included evaluated at eye level, color intensity, origin Ceylon Sri Lanka, and enhancement by heat treatment, is available through The Natural Sapphire Company for buyer review. For collectors and designers seeking a technically refined, visually engaging parti sapphire, this piece offers a measured balance of geometry, light performance, and natural character.