12.30 Ct. Bi Color Sapphire Crystal from Ceylon (Sri Lanka)

This semi translucent bi color sapphire of 12.30 carats, supplied by The Natural Sapphire Company, presents as a various shape specimen with dimensions of 23.01 by 9.16 by 7.52 millimeters, executed in a rough crystal cut that preserves primary crystal terminations while introducing minimal, deliberate facet planes to improve optical transmission and surface symmetry. The rough crystal cut philosophy employed here retains the natural morphology of the host crystal, allowing the internal color zoning to remain visually apparent across different viewing angles, and it provides strong character for collectors and designers seeking an organic, mineralogical aesthetic. The sapphire exhibits vivid color intensity, a semi translucent body that modulates light rather than transmitting it fully, and an excellent polish on the intentionally smoothed facets and terminations, resulting in crisp surface reflections without the appearance of polishing luster loss that can occur on heavily included material.

Clarity is graded as included at eye level, the most realistic grading perspective for mounted or wearable gemstones, meaning internal features are visible without magnification and contribute to the gem character rather than detracting from overall appeal. These internal features are consistent with natural corundum from Ceylon Sri Lanka, and they interact with the bi color zoning to produce dynamic visual depth when the stone is tilted or rotated, a quality enhanced by the carefully preserved crystal habit. No enhancement has been applied to this sapphire, it is untreated, which preserves natural provenance and allows gemological attributes such as absorption spectra and pleochroic behavior to remain intact for accurate laboratory analysis. For lapidary planning the piece responds well to orientation that emphasizes the interface between the two color zones, and the current rough crystal cut makes it suitable for contemporary bezel or raw set designs, or for further cutting to a more conventional faceted or freeform profile if a client desires increased brilliance or specific size yield. The combination of weight, vivid color intensity, natural bi color zoning, and Sri Lankan origin makes this specimen a technically interesting and versatile choice for connoisseurs and designers.