5.13 Ct. Blue Star Sapphire from Ceylon (Sri Lanka)

This translucent, Other certified Blue star sapphire weighs 5.13 carats, and is cut in an oval cabochon measuring 11.65 x 10.24 x 4.48 mm, making it a notable specimen for advanced collections. The stone exhibits a classic asterism, a sharp and centered star that becomes clearly visible under direct light, and is presented with an excellent polish that enhances surface luster and the star effect. Color is described as blue with medium intense saturation, providing a balanced and versatile hue that reads well in both neutral and colored settings. Clarity is graded as very slightly included evaluated at eye level, indicating minimal inclusions that do not detract from the gem when examined without magnification. The gem is natural and unenhanced, with no treatments recorded, and its documented origin is Ceylon Sri Lanka, a region historically esteemed for producing high quality star sapphires.

For the high end gemstone collection, this piece combines rarity and wearability in a single, well documented stone. The 5.13 carat weight and substantial dimensions allow the gem to register visually when set in a ring or presented as a loose collector item, while the cabochon form preserves the asterism and the integrity of the stone. Its untreated status and clear provenance from Ceylon Sri Lanka add to its investment and curatorial appeal, and the very slightly included clarity grade is consistent with natural star sapphire formation, supporting authenticity of the star phenomenon. The Natural Sapphire Company can provide certification and detailed documentation to accompany the stone, enabling confident cataloguing or acquisition for provenance focused collections. This sapphire is suitable for display as a cabinet gem, or for commissioning into a bespoke piece where the star can be showcased under direct lighting conditions. Its hardness and durability typical of corundum support long term retention of polish and form when properly set and maintained.