3.65 Ct. Yellowish Green Sapphire from Ceylon (Sri Lanka)

This transparent 3.65 carat cushion shape yellowish green sapphire measures 8.63 x 7.78 x 5.71 mm, and it is presented by The Natural Sapphire Company as an untreated natural sapphire from Ceylon, Sri Lanka. The gem displays a light color intensity in a unique yellowish green tone that reads as delicate and fresh in daylight. Cut on a mixed brilliant scheme, the stone combines the fire and scintillation associated with brilliant faceting on the pavilion, with broader table reflections and a softly faceted crown that emphasize the gem core color. Clarity is graded as very slightly included, evaluated at eye level, and the gem is transparent to the eye, exhibiting an excellent polish that produces crisp facet junctions and consistent face up luster. There has been no enhancement to alter color or clarity, which preserves the natural character and optical response typical of Ceylon sapphires.

The mixed brilliant cut used on this cushion form is engineered to balance optical return and color retention, and the faceting plan merits close attention. The pavilion employs a series of triangular and kite shaped brilliant facets that are calibrated to maximize internal reflection and produce lively scintillation at small movement. The crown appears to utilize broader, slightly stepped facets that flatten the table reflection and allow the light to interact with the body color rather than dilute it. This approach reduces over dispersion while retaining contrast between bright and dark areas, creating defined facet patterning even in a light colored stone. The cushion outline with softened corners moderates light leakage at the girdle, and the overall symmetry and proportional relationships indicate a cutter who optimized material yield while maintaining optical performance.

Internal features are consistent with natural corundum from Ceylon, and the very slightly included clarity grade indicates small, well healed inclusions that do not significantly interrupt light transmission or reduce durability. At face up view these internal characteristics are minor, and they often serve to authenticate natural origin and provenance without conspicuously affecting brilliance. Because this sapphire has not been subjected to heat or other common enhancements, its inclusions and growth structures remain intact, providing a stable internal framework. The excellent polish minimizes surface diffusion of light and enhances the apparent transparency, so the stone presents a clear window into its color and facet architecture. Subtle pleochroic behavior can be observed as gentle shifts between yellow and green tones when the stone is tilted, a trait that adds dynamic color interest in different lighting and when set in jewelry.

From a durability standpoint this sapphire is exceptionally well suited to daily wear in rings and other jewelry, and The Natural Sapphire Company recommends a variety of secure settings depending on use. Corundum registers nine on the Mohs hardness scale, and its high hardness and substantial specific gravity work together to resist abrasion and retain fine facet edges through normal wear. Corundum shows no true cleavage, and that structural integrity, combined with a polished, undamaged girdle, reduces the risk of catastrophic splitting from incidental knocks. For active wearers a low profile bezel or a protective prong setting with substantial shoulders will further guard the gem against lateral impact. Although natural, untreated sapphires are thermally and chemically stable under routine conditions, care should still be taken to avoid strong acids and abrasive cleaners, and to seek professional advice regarding ultrasonic or steam cleaning if significant internal fractures are suspected. This 3.65 carat Ceylon cushion sapphire unites refined cutting craftsmanship, pleasing light performance, and robust physical properties, making it an excellent candidate for everyday jewelry that combines technical integrity with distinct, natural color.