2.11 Ct. Bi Color Sapphire from Ceylon (Sri Lanka)

This transparent 2.11 carat, emerald cut, bi color sapphire measures 8.13 x 6.13 x 4.30 mm, and presents a well balanced face up profile with a measured depth that is approximately sixty percent relative to the mean of the length and width. The pavilion and crown have been executed in a traditional step facet arrangement, producing a broad table and long parallel facet planes that articulate the stone's internal structure. Clarity is graded as very very slightly included, evaluated at eye level, and the polish is excellent, minimizing surface disturbance to reveal internal features with clarity. The color intensity reads as medium, with a distinct two tone distribution that shifts between cooler violet blue and a clearer cornflower blue depending on orientation, an effect amplified by the stone's Ceylon provenance and the controlled heat treatment applied. This sapphire is offered by The Natural Sapphire Company, and the combination of cut proportions, bi color zoning, and finish results in a gem that balances face up brilliance with a characterful, gemological fingerprint.

Under magnification the inclusion suite of this Sri Lankan sapphire provides the unmistakable signature that separates natural material from synthetic and assembled stones. Fine oriented rutile silk appears as very thin, parallel needles that are concentrated along sectoral growth boundaries, producing subtle linear striations when viewed along the table. Scattered euhedral mineral crystals, often appearing as translucent to reflective pinpoints, occur preferentially near the pavilion junctions, and negative crystal cavities with minute fluid trails are observable under oblique light. These features are complemented by angular growth zoning, where abrupt color banding indicates distinct growth sectors, and by planar twin lines that intersect the step facets at predictable angles. The inclusion population is sparse enough to preserve transparent clarity to the unaided eye, yet abundant enough under ten power magnification to provide diagnostic evidence of natural formation in a high temperature metamorphic environment typical of Ceylon deposits.

The emerald cut geometry both reveals and refines the stone's internal story, because step facets act like windows that accentuate oriented inclusions and color boundaries rather than dispersing them as brilliant cuts do. The cutter oriented the pavilion and crown to align major sectoral zones parallel to the longest axis, which preserves the bi color banding as a crisp demarcation across the table while suppressing the appearance of larger inclusions. This approach trades maximal scintillation for clarity of tone and structural legibility, a deliberate choice that suits discerning clients who value provenance cues. The excellent polish ensures facet junctions are crisp, and facet plane integrity reduces light scattering so that needle inclusions show as fine linear highlights rather than diffuse clouding. Heat treatment was applied to stabilize and enhance the blue component, a standard and well controlled enhancement for Ceylon sapphires, and the manner in which the inclusions respond to the heat treatment further corroborates natural origin and the stone's internal consistency.

For practical use and valuation the inclusion fingerprint adds to the sapphire's desirability, because each inclusion cluster and growth pattern is unique and traceable to natural crystallization history, enhancing collectability for a connoisseur. The rectangular emerald cut and the medium color intensity make this gem versatile for both classic solitaire settings that showcase the bi color window, and for architectural designs that use channel or bezel mounts to protect corners while exposing the table. Buyers should note that the very very slightly included clarity grading indicates clean appearance to the eye, with diagnostic features apparent under magnification, and that this combination of transparency, distinct bi color zoning, and Ceylon inclusion morphology is characteristic of high quality Sri Lankan material. The Natural Sapphire Company can provide detailed microscopy images and a full treatment and origin report upon request, and our gemologists are available to advise on setting recommendations that preserve the stone's signature inclusions while maximizing visual presence.