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

When you are searching for a single standout gemstone to conclude a long search for beauty and rarity, this C.Dunaigre certified Blue star sapphire answers that need with authority. This specimen weighs 25.17 carats, an impressive size for a star sapphire that allows the phenomenal asterism to read clearly at normal viewing distances. It is oval in shape with exact dimensions of 18.71 by 16.31 by 9.12 millimeters, and it is fashioned as a cabochon to maximize the six ray star that so many collectors and bridal clients insist upon. Evaluated as eye clean at eye level, and showing vivid blue color intensity with excellent polish, this gem presents as a rare natural object. Its origin is Ceylon, Sri Lanka, a provenance that matters to connoisseurs who seek stones with classic character and geological pedigree. The documentation is complete, with certification from C.Dunaigre, and GIA lab color classification confirming Blue, giving you the assurance of accuracy, and the transparency of a gem without enhancement.

If you are guided by visual impact, this star sapphire delivers a clear answer whenever light turns. The cabochon cut and its generous dimensions allow the star to form and move smoothly across the surface as the gem is tilted, producing the sought after magical effect that defines a true star sapphire. The body color is vivid and even, with the transparency allowing light to pass to the internal silk that creates the star, without the cloudiness that can mute the phenomenon. The polish is excellent, bringing mirror like reflections that frame the asterism and add depth to the blue. Because there is no enhancement, the stone stands as a natural wonder, its original character preserved, which will be important to collectors who prize untreated material and to brides who want a piece that is both meaningful and enduring.

For anyone planning a setting, whether an engagement ring that must be unique, an heirloom pendant that will be worn with pride, or a collector display that needs a museum quality centerpiece, this sapphire is an ideal candidate. The oval proportions provide a graceful silhouette that sits close to the finger when set for daily wear, and the thickness offers stability and protection to the domed cabochon. For display and for jewelry design, centering the star along the longer axis will present the most dramatic effect, and a setting that allows controlled light to play across the surface will make the star appear to float. Metal choices can amplify the blue, with platinum and white gold lending a modern cool, while yellow gold can create a vintage warmth. At The Natural Sapphire Company we can advise on mounting styles that both protect the gem and show it to best advantage, suggesting bezel options for security, or open backs when a more luminous presence is desired in a pendant design.

When you are ready to end the search, The Natural Sapphire Company will make the process simple and certain, delivering full certification, careful handling, and expert guidance every step of the way. Your purchase will be accompanied by the C.Dunaigre certification and GIA documentation that confirm origin, color classification, and the absence of enhancement, giving you both confidence and provenance. We provide options for bespoke design, secure shipping, and insured appraisal for insurance and resale purposes, and our staff will work with you to choose the best setting that preserves the gem and highlights its star. For collectors the combination of weight, untreated status, and Ceylon origin makes this 25.17 carat blue star sapphire a rare opportunity that will enhance any cabinet, and for someone seeking a uniquely meaningful engagement ring this stone will turn a promise into an unforgettable symbol. Contact The Natural Sapphire Company to view certificate images, to discuss settings and to arrange private viewing, and let this exceptional star sapphire be the resolution to your quest for beauty and rarity.