4.23 Ct. Greenish Blue Sapphire from Ceylon (Sri Lanka)

Imagine finding the exact sapphire that fulfills both a promise and a passion, a gem that answers the desire for rarity, beauty, and integrity. This 4.23 carat round greenish blue sapphire from The Natural Sapphire Company does exactly that, offering a perfect balance of presence and refinement for someone searching for an heirloom engagement ring, a standout cocktail ring, or a museum quality addition to a private collection. The gem measures 9.97 by 9.92 by 6.08 mm, and its mixed brilliant cut has been crafted to maximize scintillation while retaining a pleasing round silhouette. Transparent and showing a dark color intensity, this stone displays a rich, saturated greenish blue tone that reads as both sophisticated and evocative under a variety of lighting conditions. Evaluated at eye level it carries a clarity grade of very slightly included, which means the inclusions are minimal and unobtrusive to the naked eye, allowing the stone to present a clean, lively face up appearance. The polish is excellent, and importantly, the sapphire is natural with no enhancement, a detail that elevates its rarity and appeal for purist buyers who want their gem in the most authentic state possible.

The origin of this sapphire, Ceylon, Sri Lanka, adds a story and a premium that discerning buyers recognize instantly. Ceylon sapphires have been celebrated for centuries for their luminous, saturated colors and exceptional crystal quality, qualities that are rooted in the island’s unique geology. The greenish blue hue in this stone is the result of precise trace element chemistry within the corundum, and when that chemistry is combined with the classic Ceylon clarity and depth, the result is a color that seems to glow from within. Collectors and connoisseurs often prize Ceylon provenance because it speaks to a history of skilled lapidary tradition, transparent trade practices, and mines that have produced some of the most famous sapphires in the world. At The Natural Sapphire Company we emphasize provenance because it is more than a label, it is a measure of the gem’s genetic story, its journey from earth to hand, and its standing in the market. A natural, unenhanced Ceylon sapphire of this size and quality is rare, and that rarity translates into lasting value, both emotional and financial.

For an engagement ring the proportions of this 4.23 carat round sapphire are ideal for showcasing color without overwhelming the design, and the mixed brilliant cut offers a lively play of light that flatters both simple and elaborate settings. The substantial diameter combined with the moderately deep pavilion delivers presence on the finger, while the excellent polish ensures that facets catch light cleanly and return it as bright flashes and soft, velvety depth. For collectors who prioritize natural, untreated gems, this sapphire represents an opportunity to own a stone that is honest in every sense, with clarity that allows the eye to travel through the gem and appreciate its internal character. Jewelers will appreciate the stone’s workability, the consistent pavilion depth, and the round outline that suits bezel, prong, and halo settings with equal grace. The dark color intensity imbues the gem with a formal, timeless quality that pairs beautifully with platinum, white gold, or warm yellow metals, creating contrasts that emphasize the greenish blue character without compromising brilliance.

Choosing this sapphire from The Natural Sapphire Company means choosing a partner who understands the language of fine gems, and who can help translate your intent into a finished piece that carries meaning for generations. We provide full details on size, cut, clarity, color intensity, and origin because we know that educated buyers make confident choices. The stone’s natural, unenhanced status, its Ceylon origin, and its excellent polish are attributes we highlight because they are the precise qualities that collectors and commitment buyers seek. If you are building an engagement ring, we can collaborate on a design that balances the gem’s rich color and presence with settings that protect and amplify its beauty. If you are a collector, we can assist with provenance documentation, secure appraisal, and advice on preservation. This sapphire is more than a gem, it is an answer to the search for authenticity, beauty, and enduring value, and we at The Natural Sapphire Company stand ready to guide you through making it yours.