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

One transparent cushion shape bi color parti sapphire weighing 1.14 carats, with exact dimensions 6.35 by 6.29 by 3.67 millimeters, exemplifies how corundum structure translates into an engineered optical performance. The sapphire is natural Ceylon origin, unheated and without enhancement, displaying intense color intensity and a clarity grade described as very very slightly included when viewed at eye level. At the microstructural level the trigonal corundum lattice and the high refractive index intrinsic to sapphire concentrate and redirect incident light, while the modest birefringence organizes color along crystallographic directions to produce pronounced pleochroism. In a parti gem this pleochroism becomes an advantage, enabling distinct blue and warmer tones to emerge from different facet orientations rather than diminishing overall brightness. Because dispersion in corundum is lower than in diamond, the perceived brilliance is driven less by spectral fire and more by controlled internal reflection, facet contrast, and rapid scintillation, a behavior that this stone amplifies through precise cutting and polish.

The cutting style is faceted, executed as a mixed brilliant cut tailored to the cushion outline, balancing brilliant crown facets with calibrated pavilion steps to optimize light return and color zoning. With a table and crown geometry that favor directional light capture, and with a pavilion depth that yields an overall depth of approximately 58 percent, the stone achieves strong return of light to the observer while preserving the parti color division. The mixed brilliant scheme produces a tight scintillation pattern centrally, with larger contrast facets at the shoulders to showcase the bi color transition. An excellent polish enhances facet crispness, minimizing surface scattering and preserving the sharpness of facet junctions so that scintillation and luster remain vivid under movement. The clarity grade and transparent body allow internal facet reflections to interlace without clouding, so inclusions do not interrupt the optic pathways. This level of technical refinement, combined with natural Ceylon origin and no enhancement, makes this sapphire an exceptional selection for discerning collectors and connoisseurs, and it is offered by The Natural Sapphire Company with full disclosure of cutting, clarity, color, and provenance.