5.37 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent blue sapphire presents as an expertly proportioned oval weighing 5.37 carats, with precise dimensions of 10.58 by 8.39 by 7.06 millimeters. It is fashioned with a mixed brilliant cut that combines pavilion facets selected for optimal light return with a carefully faceted crown for crisp scintillation. Clarity is graded as very very slightly included when evaluated at eye level, which translates to exceptional visual purity and a clean window for color. The color displays an intense blue saturation that is lively and even across the table, with strong mid tone and excellent polish on all facets. Origin is Ceylon, Sri Lanka, and the stone has no enhancement, a quality that preserves natural formation characteristics and contributes to stable long term value. These technical attributes are presented by The Natural Sapphire Company as part of a transparent provenance narrative that emphasizes the gem as a natural, unheated material of fine lapidary execution.

Optically, the mixed brilliant cut of this sapphire yields a distinctive balance between brilliance and color saturation. The crown facets disperse light into crisp flashes across the table while the pavilion architecture returns depth of tone from the body of the stone. At typical viewing distances the gem reads as a deep, pure blue without the brown or gray modifiers that can mute color in lower grade material. The very very slightly included clarity permits strong light transmission, so that internal features do not interrupt the ribbon like color zones that give the gem a consistent face up appearance. In daylight the stone presents a vivid, electric blue, while under softer indoor lighting the hue retains depth rather than flattening. The excellent polish enhances surface brightness and edge crispness, promoting lively scintillation as the stone moves, and the oval outline provides flattering proportions for both solitaire and multi stone settings.

When compared to historically renowned sapphires, this Ceylon example occupies a distinct position that combines the most desirable aspects of several celebrated types. Kashmir sapphires are famed for their velvety cornflower blue and silky diffusion of light, a look that is exceptional but rare and typically associated with a particular geologic interval. Burmese sapphires are often lauded for deep, saturated royal blue that reads richly at all sizes. Ceylon sapphires historically are recognized for a brighter, more electric blue and for lively transparency. This stone exemplifies the Ceylon profile, presenting a vivid and lively blue with the glasslike clarity more commonly associated with top tier material. Unlike the Star of India, which is prized for its asterism and large size but often exhibits a more opaque body, this sapphire is transparent and cut to maximize faceted brilliance. Relative to famous large museum pieces such as the Logan Sapphire, which is remarkable for scale and historical provenance, this gem offers concentrated qualities in a wearable size, combining color intensity, clarity, and excellent cut proportions in a way that is immediately suitable for fine jewelry.

Practical considerations for setting and long term care reflect the technical strengths of the stone. At a hardness appropriate for daily wear and with a well proportioned pavilion depth that supports secure mounting, this 5.37 carat oval sapphire adapts readily to ring, pendant, or bespoke designs that take advantage of both face up area and depth. Metals such as platinum, high grade palladium, and 18 carat yellow or white gold provide complementary contrast depending on design intent, with warmer metals intensifying the perception of blue warmth and whiter metals enhancing the gematographic coolness. Because the sapphire is natural and unheated, its current appearance represents stable natural color and clarity, and recommended care is standard for corundum, consisting of periodic gentle cleaning with mild detergent and warm water and occasional inspection of the setting. The Natural Sapphire Company provides documentation of origin and treatment status, supporting provenance and long term confidence in this gem as a component of an heirloom quality piece. Taken together, the combination of intense natural color, very very slightly included clarity, mixed brilliant faceting, and unenhanced Ceylon origin defines the unique value proposition of this sapphire, positioning it as a refined choice for collectors and jewelry makers seeking transparency, character, and enduring visual impact.