0.88 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This example of Ceylon corundum presents as a transparent round blue sapphire weighing 0.88 carat, with calibrated dimensions of 5.33 by 5.32 by 3.93 millimeters. The gem has been fashioned to a mixed brilliant silhouette, combining a classic brilliant style crown with a precisely controlled pavilion geometry, a design choice that enhances both scintillation and color saturation. The measured pavilion depth relative to average diameter produces a depth to diameter ratio of approximately 74 percent, a deliberate proportion that concentrates color and enhances face up tone without compromising return of light when the faceting is correctly aligned. Color grading for this stone is medium intense, a balance of tone and saturation typical of fine Ceylon material that displays vivid blue across a range of lighting conditions. This sapphire is unenhanced, showing no heat treatment or diffusion, and therefore retains its native absorption profile and natural pleochroic behavior, characteristics which trained gemologists and demanding collectors value highly.

The mixed brilliant faceting exhibits a disciplined approach to facet angles and junctions, with a brilliant style crown that uses multiple kite and star facets to break incident light into a lively pattern of small flashes, while the pavilion employs calibrated step elements to channel light back through the table for sustained brilliance. The result is a gemstone that juxtaposes pinpoint scintillation with broader flashes of blue, yielding a dynamic visual texture that reads as lively and saturated at typical viewing distances. Clarity is described as very slightly included, evaluated at eye level, a grade indicating that inclusions are minor, well healed, and generally positioned so as not to interrupt the primary light path. Those inclusions serve as natural fingerprints rather than detractors, often aiding in identification while remaining visually unobtrusive. The polish is excellent, indicating that facet planes are exceptionally well finished to optical standards, minimizing surface diffusion and maximizing contrast between internal reflection and external reflection, which in turn amplifies perceived brilliance and luster.

As a centerpiece in a collection or a signature mounted jewel, this sapphire benefits from settings that respect its mixed faceting and depth profile. An open prong setting that permits unobstructed pavilion access to light will emphasize the stone s natural brilliance, while a low bezel with polished inner surfaces can increase apparent saturation by reducing light leakage, a useful option for designs that prioritize color intensity. Halo settings with calibrated melee can provide contrast and optical amplification, making the medium intense blue read richer against white metal surrounded diamonds, whereas warm metal tones can create a more vintage, softer presentation. At 5.33 millimeters in diameter the stone fits standard round mountings and will translate predictably into common ring and pendant proportions, and at 0.88 carat it occupies a practical weight class for everyday wear without sacrificing presence. The Natural Sapphire Company sources and grades each piece with rigorous attention to provenance and technical detail, and this Ceylon round offers a rare combination of unenhanced origin, precise mixed brilliant cutting, very slightly included clarity at eye level, and excellent polish, qualities that together establish it as a refined focal point suitable for connoisseurs and technical buyers seeking a sapphire that performs as strongly in optical metrics as it does in aesthetic value.