1.68 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent pear shaped blue sapphire weighs 1.68 carats, and measures 8.24 by 5.79 by 4.45 millimeters, cut in a mixed brilliant style that combines a faceted pavilion with a more traditional brilliant crown to maximize fire and scintillation. The stone presents a light color intensity that reads as a delicate, pastel blue, characteristic of material from Ceylon, and it is finished with an excellent polish that enhances surface brightness and sharpness of facet junctions. The clarity is graded as slightly included when evaluated at eye level, indicating the presence of internal features that are visible under close inspection but do not dominate the visual experience of the gem. The sapphire has been heat treated in a controlled manner to optimize its tone and clarity, and its origin is documented as Ceylon Sri Lanka by The Natural Sapphire Company.

The inclusions within this sapphire form the hallmark that gives it an unmistakable signature, and understanding their nature explains both the gemological value and its visual personality. Fine rutile silk in delicate, hairlike needles weaves through portions of the crystal structure, producing a subtle satiny sheen in certain orientations, while isolated mineral crystal inclusions punctuate the interior with tiny reflective facets that catch light at acute angles. Growth zoning and faint sectoral color distribution are present in microscopic bands, evidence of the conditions of crystallization in Sri Lankan deposits, and occasional healed fissures appear as lacy, translucent planes where earlier fractures annealed during natural processes and subsequent heat treatment. In a few locations there are small negative crystals and two phase features that trap a little of the original fluid inclusion environment, creating pinpoints of internal sparkle and microscopic scenes that are diagnostic under magnification. Collectively these features do not detract from the overall transparency of the stone, rather they interact with the mixed brilliant cut to produce depth and life, softening the light and contributing a gentle, internal scintillation that changes with movement and viewing angle. For gemologists and informed collectors these inclusion types are consistent with natural Ceylon sapphires, and in this example the patterning and character of the inclusions remain legible despite heat treatment, providing a trustworthy internal fingerprint.

The combination of the pear outline, mixed brilliant cutting, excellent polish, and the specific internal character yields practical considerations for design and care that are important to note. The tapered silhouette of the pear shape positions the eye toward the pointed end, and the placement of the most notable inclusions in relation to that axis will influence how the stone reads in a setting, therefore a thoughtful orientation will showcase the soft blue color and balanced internal glow. The mixed brilliant cut enhances contrast and return of light across the table and crown facets, so that the fine silk and crystal inclusions appear as lively, three dimensional features rather than static blemishes, and the overall effect is one of refined luminosity rather than busy opacity. Because the clarity is slightly included at eye level, routine inspections and customary jewelry care are prudent, including gentle cleaning with warm water and a mild detergent, and occasional professional checks to confirm secure mounting. The heat treatment applied to this sapphire is a common and accepted method to improve visual qualities, and it has contributed to the gem reaching its present balance of color and clarity while leaving the natural inclusion signature intact. Full details of provenance and treatment are maintained by The Natural Sapphire Company, and further magnified imagery or a gemological report can be provided upon request for those who wish to study the unique inclusion map that gives this Ceylon sapphire its unmistakable identity.