0.72 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This is a beautiful transparent 0.72 carat round blue sapphire, offered by The Natural Sapphire Company, presented with precise proportions of 5.26 x 5.20 x 3.43 mm, a mixed brilliant cut, vivid color intensity, and an excellent polish. The stone originates from Ceylon Sri Lanka, a source renowned for producing sapphires with clear, vibrant blue hues and desirable optical properties. Clarity has been graded as very slightly included, evaluated at eye level, which means that small natural internal characteristics are present but do not detract from the gemstone when viewed without magnification. This sapphire has been heat treated, a widely accepted and stable enhancement in the trade, performed to optimize color saturation and overall visual appeal while maintaining the integrity and durability of the stone.

The exceptional sparkle of this sapphire stems from a combination of its corundum crystalline structure and the precision of the mixed brilliant cut. Corundum has a high refractive index, which governs how light bends as it enters and exits the gem, and this property is the physical foundation of brilliance in sapphires. The mixed brilliant cut used here balances a faceted crown with a well configured pavilion, allowing for efficient light return and lively scintillation. Crown and pavilion facets work together to capture, reflect, and refract incident light, producing bright flashes and a play of lighter and deeper blue tones across the table and facets. In a well cut stone such as this, the angles and facet sizes are tuned to maximize the internal reflection paths, drawing light deeper into the gem and throwing it back with intensity. The result is a sparkle and liveliness that distinguish it from more shallow or poorly faceted stones.

Clarity and polish further enhance the visual performance of the sapphire. The very slightly included clarity reflects natural growth features that are commonly found in corundum, often contributing to the stone’s authenticity and origin fingerprint. Since these inclusions are small and non intrusive at eye level, they do not interrupt the path of light in a way that diminishes overall brilliance or dispersion, so the viewer experiences a clean, glowing appearance. Excellent polish ensures that facet junctions are crisp and mirror like, reducing light leakage from the surface and supporting a high level of brilliance. The disclosed heat treatment has been carefully applied to improve the blue hue and even out color zoning, which in turn allows the cut and polish to perform optimally. Heat treatment is a standard and accepted practice in the sapphire market, and when clearly disclosed it provides predictable, stable enhancement without compromising hardness or longevity.

From a connoisseur and investment perspective, this 0.72 carat Ceylon sapphire offers a compelling combination of color, cut, clarity, and provenance. Ceylon sapphires are prized for their electric and often silky cornflower to vivid blue tones, a quality that educated buyers recognize as both aesthetically desirable and historically valuable. The vivid color intensity of this stone is particularly significant, as color typically carries the greatest weight in sapphire valuation, followed by clarity and cut quality. The mixed brilliant cut and exacting proportions produce superior light performance in a size that is versatile for a range of jewelry settings, from classic solitaire rings to refined pendant pieces. As with all items from The Natural Sapphire Company, this sapphire is presented with transparent disclosure of origin and treatment, enabling buyers to make informed decisions. Proper setting and routine care will preserve its optical beauty for generations, making it an excellent choice for someone seeking a gem that combines scientific merit, practical durability, and enduring visual impact.