1.73 Ct. Bluish Purple Star Sapphire from Ceylon (Sri Lanka)

This translucent oval star sapphire weighs 1.73 carat, it measures 7.52 by 5.34 by 4.25 mm, it presents a bluish purple hue with medium color intensity, it originates from Ceylon Sri Lanka, it has a clarity grade of very slightly included evaluated at eye level, it carries no enhancement, and it exhibits an excellent polish. The cabochon cut is executed with meticulous symmetry, the oval outline is true and evenly proportioned, the dome height is deliberately balanced against the length and width to maximize internal light reflection and to centralize asterism. At this scale the dome geometry yields a clean visual field, the translucent bodycolor allows the star to float against the field rather than be lost within opacity, and the excellent surface polish provides a mirror plane that supports sharp, mobile highlights during viewing and wear.

Technically the piece benefits from geometric shaping that functions as an analog to faceting, allowing maximum light play through controlled curvature and axis orientation. The lapidary work aligns the dome axis precisely with the sapphire crystal c axis and with the orientation of the rutile silk, producing a tight, well centered star that responds to directional lighting with crisp movement. The geometric cabochon shaping emphasizes symmetry of the oval facets created by the interplay of curved surfaces, it optimizes angles of incidence and reflection within the stone, and it enhances contrast between the star and the surrounding bodycolor. Craftsmanship notes include exacting preforming, progressive smoothing of the curve through graded laps, and a final polish that removes microabrasions without softening the star edge. For discerning buyers who appreciate technical refinement, this 1.73 carat Ceylon star sapphire demonstrates how proportional dome geometry, precise orientation, and superior surface finish combine to yield exceptional asterism and lively light play. The Natural Sapphire Company offers this stone with full provenance and the assurance that no enhancements have been applied, making it an attractive candidate for collection or bespoke mounting where the geometry of the setting will further complement the sapphire s inherent optical performance.