5.07 Ct. Greyish Blue Star Sapphire from Ceylon (Sri Lanka)

This AGL certified Grayish Blue star sapphire weighs 5.07 carats, presented as an oval shape cabochon with dimensions 9.33 x 7.78 x 7.27 mm. The proportionally high dome is an intentional cut parameter, calibrated to present a sharp, mobile six rayed asterism under direct illumination, while preserving a pleasing table-to-depth ratio for wearable jewelry. The cabochon cut shows expert shaping and symmetrical outline, with a precise alignment of the domed face to the stone's crystallographic c axis, which maximizes the oriented rutile needle reflections that produce the distinct star. Clarity is graded very slightly included evaluated at eye level, a grade that indicates minimal host mineral inclusions that do not detract from the star phenomenon, while contributing to the stone's depth and body color. Color reads as a saturated grayish blue with intense color intensity that balances cool steel tones and soft blue saturation, allowing the star to contrast crisply against the body color. The polish is excellent across the domed surface and girdle, enabling strong light return and a near mirror finish that improves the asterism visibility and wear resilience. There has been no enhancement applied to this sapphire, a critical detail that confirms its natural optical characteristics and long term stability. The specimen originates from Ceylon Sri Lanka, a provenance known for producing classic star sapphires with fine silk and well defined stars, and this piece is accompanied by the AGL report that documents its natural, unenhanced state.

At The Natural Sapphire Company we prioritize traceability, artisanal craftsmanship, and responsible procurement, and this star sapphire is offered within that framework. The stone was sourced through channels that respect local mining communities in Sri Lanka, employing due diligence on labor conditions and environmental impact, and we document its path to market to provide collectors with confidence in provenance. For the conscious buyer who values both gemological integrity and ethical supply chains, this untreated AGL certified star sapphire presents a compelling addition to a curated collection, combining technical excellence in cut, polish, and optical performance with verified origin and no enhancement. Its durable cabochon form and clear documentation make it suitable for bespoke settings that highlight the star, or as a collectible investment grade gem, and our team can provide further technical data, mounting recommendations, and certification copies upon request.