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

This cushion shape blue sapphire presents with precise dimensional proportions and an authoritative presence for connoisseurs. Weighing 7.84 carats, the stone measures 13.33 by 9.44 by 7.22 millimeters, giving it a robust profile suitable for prominent settings. The cutting style is a sugar loaf cut executed on a cushion outline, combining the soft rectangular curvature of a cushion with a high, domed cabochon profile typical of sugar loaf work. This approach sacrifices faceted pavilion complexity in favor of a continuous convex surface, producing an uninterrupted face up field that emphasizes color saturation and depth. Clarity is graded as very slightly included when evaluated at eye level, indicating only minor internal characteristics that do not detract from transparency or from the visual uniformity of the blue. Color intensity is vivid, with consistent saturation across the table and minimal observable zoning under standard lighting. The finish is an excellent polish, yielding a high gloss luster across the dome and achieving clean, tight reflections that testify to meticulous lapidary control. The sapphire is heat treated, a stable and commonly accepted enhancement to optimize hue and saturation, and the material is sourced from Ceylon, Sri Lanka, a provenance known for producing blue material with exceptional tone and classic sapphire character. The Natural Sapphire Company offers this specimen as an example of refined cutting married to classic origin qualities.

From a gemological and lapidary perspective the sugar loaf cushion format produces a specific set of optical behaviors that knowledgeable buyers will appreciate. The pronounced dome reduces windowing by increasing effective optical path length, concentrating color and minimizing areas of pale transmission. With the given depth of 7.22 millimeters relative to the length and width, the stone exhibits a depth proportion that enhances color saturation without inducing excessive darkness, resulting in approximately 63 percent of depth relative to the mean of length and width, a proportion that contributes to the vivid appearance. The sugar loaf surface eliminates faceted crown pavilion junctions, instead relying on precise curvature and symmetry to control light return. As a result pleochroic effects may be subdued visually because the dome blends directional light returns into a uniform field, yet subtle shifts in hue under oblique viewing will be apparent to a trained eye, revealing the underlying dichroism common to corundum. Internal inclusions evaluated as very slightly included are sparse and well distributed, demonstrating that the material retains strong transparency and light transmission. The polish quality is exceptional, with micro finish and lap lines removed to a degree that produces crisp internal reflections and limited scattering, qualities that are desirable to collectors and high end designers alike.

Practical considerations for setting, care, and valuation are important for buyers who will commission fine jewelry or maintain a collection. The cushion sugar loaf profile behaves differently in mounting than faceted stones, and recommended settings include low to medium height bezels that cradle the dome and protect the girdle area, or custom seats that allow for minimal metal intrusion over the crown edge to preserve the uninterrupted face up color. Prong settings can be used where metal placement is minimal, however a protective bezel is preferred for daily wear to mitigate impact on the domed surface and to secure the stone s increased thickness. Given the heat treated nature of the sapphire, the enhancement is stable under normal wear and conventional cleaning, however avoid prolonged exposure to harsh chemicals and extreme thermal shock. Professional ultrasonic cleaning is acceptable in most cases, but consult with The Natural Sapphire Company or a trusted gemological laboratory if there is concern about surface treatments or ancillary fillings. For provenance and assurance The Natural Sapphire Company can provide detailed photographs, cutting reports, and can assist with independent gemological verification upon request, facilitating informed purchase decisions. This 7.84 carat Ceylon sugar loaf cushion sapphire is best appreciated by those who value the interaction of classical origin, considered proportions, and lapidary expertise, and it offers a commanding color presence for bespoke settings and investment quality collections.