4.55 Ct. Blue Cabochon Sapphire from Ceylon (Sri Lanka)

This translucent cushion shape blue sapphire weighs 4.55 carats, and measures 9.77 x 8.14 x 6.27 mm, and it is an excellent example of a sugar loaf cut that emphasizes depth of color and a pleasing domed profile. The sugar loaf cut is a traditional style for sapphires, particularly effective for stones with exceptional color saturation, because the domed crown and rounded facets concentrate and reflect light in a way that enhances the stone's vivid tonal richness. This example displays vivid color intensity across its surface, with a deep, regal blue that reads consistently in multiple lighting situations. The polish is graded excellent, contributing to a clean visual presentation and a reflective surface that complements the gem's translucency. At The Natural Sapphire Company we present this stone as a mature collector quality sapphire, suitable for a prominent ring or an elegant pendant, where its size and presence will be fully appreciated.

From a gemological perspective this sapphire is graded as very slightly included when evaluated at eye level, which is a distinction that educated buyers understand as a balanced combination of transparency and natural character. Inclusions in natural sapphires are expected and often act as internal fingerprints that support natural origin, they also have minimal impact on the overall visual appeal when the clarity grade is very slightly included. The stone has been heat treated, which is the industry standard enhancement for improving color and clarity in corundum, and this treatment is stable and permanent under normal wear conditions. Heat treatment alters the internal structure and removes or reduces certain types of inclusions, while also intensifying the blue hue, so buyers can appreciate the enhanced visual performance without unusual care requirements. The excellent polish and the sugar loaf profile together preserve the rich blue saturation while allowing the stone to transmit light softly, rather than relying on faceting to create sparkle.

The origin of this sapphire is Ceylon Sri Lanka, a source long celebrated for producing sapphires with lively, vivid blues that often exhibit a distinct luminosity and a slightly lighter touch compared to some of the very deep, inky blues from other regions. Ceylon sapphires are prized by connoisseurs for their balance of color, clarity, and brightness, qualities that can lend a gemstone both aesthetic desirability and historical cachet. For an educated buyer, origin matters because it informs both market perception and price dynamics, and Ceylon stones frequently command premium interest when color and clarity combine as they do in this piece. The dimensions of 9.77 x 8.14 x 6.27 mm and the 4.55 carat weight make this sapphire a versatile gemstone for bespoke settings, allowing jewelers to design settings that showcase the domed silhouette or to custom cut complementary metals to accentuate the gem's vivid blue. Given the corundum hardness of nine on the Mohs scale, this sapphire is suitable for everyday wear when set responsibly, but its value will be best preserved with routine care and proper mounting.

At The Natural Sapphire Company we emphasize transparent disclosure, rigorous assessment, and responsible sourcing, and we provide detailed information so that collectors and buyers can make informed decisions. This sapphire combines a strong, vivid color, a thoughtful traditional sugar loaf cut that preserves weight and color intensity, very slightly included clarity at eye level, and an excellent polish, all supported by the documented Ceylon origin and the standard practice of heat treatment. For design considerations the stone will sit beautifully in both bezel and prong settings, the domed crown offering a tactile, substantial presence that reads as elegant yet robust. We recommend professional cleaning with mild soapy water and a soft brush, and routine inspections of the setting to ensure the stone remains secure, particularly for daily wear pieces. Prospective buyers who value provenance, optical quality, and enduring materials will find this 4.55 carat Ceylon sapphire a distinguished choice, and our team at The Natural Sapphire Company is available to provide additional measurements, high resolution images, and consultation on mounting options and certification to support acquisition and long term enjoyment.