3.98 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 3.98 carat cushion shape blue sapphire measures 9.72 x 7.68 x 6.00 mm, and is faceted in a mixed brilliant cut to balance scintillation and color depth. The stone displays vivid color intensity and an excellent polish, with a clarity grade recorded as slightly included when evaluated at eye level. Origin is Ceylon Sri Lanka, and the gem has been heat treated to enhance its inherent blue saturation. The proportions and cut have been executed to maximize the stone face up presence, producing a lively interplay of deep cornflower blue tones and brighter flashes where the pavilion facets return light.

The inclusions within this sapphire are the features that give it an unmistakable signature, and they are consistent with high quality Ceylon material. Fine silk like rutile needles create a softening veil that subtly diffuses light, contributing to a velvety clarity and amplifying the perceived depth of color without obscuring brilliance. Occasional small negative crystal pockets and linear growth features are present, forming characteristic internal patterns that read as a fingerprint to the trained eye, while remaining unobtrusive at normal viewing distance. These internal features interact with the mixed brilliant faceting to produce areas of concentrated blue and zones of lighter reflection, yielding a dynamic but harmonious visual texture. Under magnification the internal map is instructive, showing growth zoning and delicate liquid or healed fracture features that attest to natural formation and geological history, while the eye level appearance remains attractive and transparent. The combination of vivid Ceylon color, precise mixed brilliant cutting, and internal silk and growth signatures result in a sapphire that is both technically refined and distinctly individual. This detailed assessment is provided by The Natural Sapphire Company to inform setting and design choices, and to aid in understanding how the gem will perform when mounted in a ring or pendant.