1.00 Ct. Greenish Blue Sapphire from Ceylon (Sri Lanka)

This 1.00 carat cushion shaped greenish blue sapphire is a study in proportion and natural color, sourced from Ceylon Sri Lanka and offered by The Natural Sapphire Company. Exact dimensions measure 5.40 by 5.29 by 3.85 millimeters, reflecting a well balanced cushion outline with substantial face up presence. The tone sits at a dark intensity, producing a deep, saturated greenish blue that reads richly under both daylight and incandescent lighting. Transparency is excellent, the stone is described as transparent, and the polish is graded excellent, delivering a strong satiny to mirror like finish across the crown facets and girdle junction. Importantly, this sapphire is untreated, with no enhancement, which preserves the original crystalline color and makes the gem particularly desirable for collectors and connoisseurs who prioritize natural material integrity.

The cutting style is faceted with a mixed brilliant scheme, combining traditional brilliant facets on the crown with a more geometric pavilion arrangement. This mixed brilliant approach is selected to reconcile two competing objectives, namely optimizing light return for fire and scintillation, while also preserving color saturation in a darker material. The crown exhibits a relatively large table with a field of star and kite facets that direct light into the pavilion, and the pavilion facets are configured to channel that return energy toward the observer. The depth to diameter relationship, given the 3.85 millimeter depth against a mean diameter near 5.34 millimeters, produces a moderately deep profile that enhances apparent color saturation without sacrificing too much face up brightness. Facet junctions are precise, and the excellent polish supports bright facet contrast, which is essential for a mixed cut to show both the lively white flash of the brilliant facets and the more subtle color flashes inherent to sapphire.

Clarity is graded as very slightly included when evaluated at eye level, which for a 1.00 carat transparent sapphire means the inclusion inventory is minimal and does not impede the gem s visual impact. Typical inclusions at this clarity tier are fine pinpoint crystals or minute rutile silk that sit beyond the table plane, and these features often become visually effaced by the stone s dark tone and by the strategic faceting. From a durability standpoint, there are no reported structural weaknesses, and the integrity of the pavilion and girdle attests to careful cutting practices. Optical character is classically trichroic, with subtle shifts between blue and greenish blue as the gem is tilted, a quality that the mixed brilliant cut is designed to accentuate. The absence of heat or other enhancements means the pleochroic pattern and inclusion set are natural, which supports accurate assessment and long term value retention.

In practical jewelry design terms, the sapphire s combination of weight, cushion outline, and eye level clarity makes it exceptionally well suited for a statement piece. At one carat the face up diameter reads larger than many round equivalents because the cushion silhouette maximizes surface area, translating into a bold center stone presence for a solitaire ring or a minimal halo pendant. Recommended mounting approaches include a four or six prong setting that opens the pavilion to light, a halo that uses contrast to emphasize the dark, saturated tone, or a low profile bezel that showcases the stone s polish and protects the girdle without muting its color. For clients who favor a modern aesthetic, a tension style or deep cup setting can create a floating visual that highlights pleochroism and facet play. As presented by The Natural Sapphire Company, this Ceylon sapphire offers a rare convergence of natural origin, precise mixed brilliant faceting, eye level clarity, and no enhancement, making it a compelling choice for a refined statement piece that balances technical craftsmanship with striking visual presence.