4.37 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This is a transparent 4.37 carat cushion shape blue sapphire, measuring 9.96 by 9.41 by 5.52 millimeters, faceted with a mixed brilliant cut, graded eye clean at normal viewing distance, showing intense color intensity and finished with an excellent polish, heat treated to enhance its color stability, originating from Ceylon Sri Lanka, offered and fully disclosed by The Natural Sapphire Company. For an educated buyer these attributes matter, the carat weight and table size deliver a strong visual presence for a center stone, while the mixed brilliant cut is chosen to balance scintillation and color saturation, retaining weight while opening the pavilion to maximize lively return of light. The eye clean clarity grade indicates that no inclusions are visible to the unaided eye, preserving purity of face up appearance and allowing the intense color to read evenly across the table, the excellent polish ensures crisp facet junctions and bright reflections, and the documented heat treatment is the industry standard enhancement for Burmese and Ceylon sapphires that improves tone and saturation in a stable manner when disclosed and performed responsibly.

The journey of this sapphire begins in Sri Lanka, in alluvial and eluvial deposits where experienced local miners and sorters recognize rough with promising hue and clarity. The rough was carefully selected for its natural blue tone and stability, then sent to an expert cutter who chose a cushion outline and a mixed brilliant facet scheme to best present the stone, the cutter optimized proportions to retain 4.37 carats while creating depth and windowing control so the intense color remains concentrated rather than washed out. After precision cutting the stone received an expert polish to achieve the excellent finish, followed by standard and transparent heat treatment to enhance and stabilize its rich blue, then the gem underwent final grading and photography, and provenance and treatment information was recorded by The Natural Sapphire Company for buyer confidence. For collectors and connoisseurs this sapphire combines classic Ceylon origin, attractive size, eye clean clarity, and a considered cut and polish, making it suitable for a fine engagement ring or a museum quality bespoke setting, and we welcome inquiries for certification details, high resolution images, and bespoke mounting options.