4.18 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 4.18 carat cushion shape blue sapphire measures 9.95 x 7.76 x 5.91 mm, presenting a well defined cushion outline and a depth that is approximately 67 percent of the average table dimension. The gem has been fashioned with a mixed brilliant cut, employing a brilliant style crown paired with a faceted, modified pavilion to balance maximum scintillation with controlled color saturation. The mixed cut profile concentrates return of blue light through the table while the pavilion facet architecture deepens tonal intensity, a desirable outcome for stones from Ceylon. Clarity is graded as very slightly included when viewed at eye level, indicating minor internal features that do not materially interrupt the gem s overall transparency or faceted light performance. The vivid color intensity is evenly distributed across the face up view, with the stone exhibiting the lively, saturated blue that collectors associate with Sri Lankan origin, and the excellent polish and precise facet junctions enhance face up brilliance and deliver crisp facet reflections.

From a practical and technical standpoint this sapphire is highly suitable for daily wear, corundum rates 9 on the Mohs scale, second only to diamond, therefore the stone offers exceptional resistance to abrasion and surface wear under normal use. Heat treatment has been applied to stabilize and intensify the blue, a wholly accepted enhancement among connoisseurs that yields durable, long lasting color when set and worn. The combination of a high polish and robust hardness means the stone responds well to a variety of mounting styles, though settings that protect the cushion corners such as bezel or partial bezel styles will offer additional physical security while allowing the mixed brilliant cut to display optimally. As presented by The Natural Sapphire Company this Ceylon sapphire is a technically sophisticated specimen, offering measured proportions, refined cutting strategy, and stable enhancement, all of which make it an excellent choice for customers seeking a durable, color saturated center stone with strong optical performance.