0.83 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 0.83 carat round blue sapphire presents precise proportions and first rate finish, ideal for a discerning collector or a refined engagement design. The gemstone measures 4.94 x 4.91 x 2.74 millimeters, producing an overall depth of approximately 55.7 percent, a dimensioning that balances face up size and color saturation. The material is transparent with vivid color intensity, evaluated as a pure saturated blue consistent with fine Ceylon material, and the finish is reported as excellent polish. Origin is Ceylon Sri Lanka, and enhancement by controlled heat treatment has been applied to optimize hue and clarity, a standard and stable practice in fine sapphire preparation. The clarity grade is very very slightly included evaluated at eye level, which means the sapphire reads clean to the unaided eye while retaining natural internal characteristics that can be observed under modest magnification, assuring both visual appeal and natural provenance.

The cutting style is a mixed brilliant, executed to emphasize both brilliance and color depth through a deliberate faceting strategy. The crown employs a modified brilliant facet arrangement, incorporating a central table surrounded by star and bezel facets to promote lively scintillation and return of white light, while the pavilion uses a combination of triangular and elongated step facets to enhance color saturation and create a deep, velvety window to the body of the stone. This mixed approach allows the cutter to manage light leakage and color performance simultaneously, maximizing face up color without unduly sacrificing brilliance. Girdle thickness is controlled to a thin to medium profile, preserving weight while providing practical security for setting, and symmetry is carefully maintained so that facet junctions align for consistent patterning when viewed face up. The excellent polish highlights crisp facet junctions and smooth facet planes, contributing to high contrast between light and dark facets for pronounced scintillation.

Inclusions are described and interpreted as unique identifiers that contribute to the gemological fingerprint of this piece, rather than as imperfections to be hidden. Under magnification this sapphire displays fine, needlelike rutile silk and a small population of minute crystal inclusions, distributed in a manner typical of Ceylon material. These internal features diffuse light at a microscopic scale, softening highlights and imparting a velvety texture to the blue face up appearance, which many connoisseurs find desirable. There are also localized healed fissures that have been sealed during natural growth or enhanced stability through heat treatment, they remain stable under normal wear and do not compromise durability. The very very slightly included clarity assessment indicates that these features are not apparent to the unaided eye at typical viewing distances, yet they provide reproducible identifiers for laboratory verification and for future provenance tracking, reinforcing the natural origin and history of the stone.

For practical use and design selection the combination of vivid color, measured proportions, and mixed brilliant cutting makes this sapphire versatile and performance oriented. The diameter near five millimeters offers a strong face up presence for solitaire rings, cluster work, or as a precision matched pair if incorporated into a bespoke set, and the moderate depth supports secure prong or bezel settings without excessive loss of visible size. The Natural Sapphire Company provides full disclosure regarding the heat enhancement and Ceylon origin, and the stone is suited to clients who value technical precision in cutting and the unique internal signatures that confirm natural formation. For those seeking a sapphire with both laboratory verifiable identifiers and exceptional visual performance, this 0.83 carat round mixed brilliant from Ceylon presents a technically refined option, combining thoughtful proportioning, excellent polish, vivid color intensity, and inclusions that enhance rather than detract from its character.