4.03 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This cushion shape sapphire weighs 4.03 carats and measures 10.22 by 7.23 by 5.39 millimeters, presenting an elongated cushion profile with a length to width ratio approximately 1.41 and a depth approximately 61.8 percent, proportions that are well suited to both solitaire and halo orientations. The stone is fashioned with a mixed brilliant cut that combines a brilliant style crown with a modified pavilion, a facet architecture that maximizes scintillation while preserving strong color concentration. The piece evaluates as eye clean at normal viewing distance, offering unobstructed visual purity without inclusions visible to the unaided eye, and it exhibits intense color intensity paired with an excellent polish, attributes that indicate crisp facet junctions and professional lapidary finishing. Origin is Ceylon Sri Lanka, a provenance known for lively blue tones and dynamic light performance, and enhancement is heat treated, a stable and widely accepted practice that optimizes hue and clarity without compromising structural integrity.

From a customization perspective this sapphire adapts to a broad spectrum of settings and technical mountings. Its mixed brilliant facet layout responds well to open backed settings that permit maximum light entry for heightened brilliance, while a closed back or bezel can be used to deepen perceived saturation for designs seeking a richer blue. A four or six prong cathedral solitaire highlights the stone morphology and secures the elongated cushion silhouette, three stone flanked designs or tapered baguette shoulders complement the length to width proportions, and a double halo with micro pavé can enhance apparent size while preserving center stone dominance. For contemporary tastes tension settings and East West orientations work well with the measured proportions, while vintage inspired filigree and bezel combinations protect the pavilion and work well for everyday wear. Metal choices alter perceived color, with platinum and white gold presenting a cooler presentation and 18 karat yellow gold subtly warming the blue, while rose gold offers a more unconventional contrast.

Practical considerations for fabrication include selecting prong profiles that clear the widened rounded corners of the cushion, engineering the gallery to protect the pavilion depth, and choosing a secure seat for heat treated material which requires normal care but benefits from sapphire hardness at Mohs nine for excellent durability. At The Natural Sapphire Company we offer bespoke design consultations, CAD renderings, and production in platinum and all karat golds, along with recommendations for complementary side stones and setting finishes to optimize optical return. Contact us to review mounting sketches, view matching pair options for earrings, or commission a custom engagement or pendant design tailored to this fine Ceylon blue sapphire.