3.10 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This cushion shaped blue sapphire weighs 3.10 carat, and measures 8.60 x 7.16 x 5.11 mm, a compact and substantial size that translates well into both statement and refined jewelry. The stone is transparent, and originates from Ceylon Sri Lanka, a source renowned for its lively blue sapphires with fine saturation and tonal balance. The gem has been heat treated, the industry standard enhancement for sapphires, applied to stabilize and intensify color without compromising durability. At eye level the clarity is graded as very very slightly included evaluated at eye level, which in practical terms means inclusions are minimal and unobtrusive to unaided vision, preserving a clean appearance and strong light return. The overall presentation of the sapphire combines classic Ceylon color characteristics with commercial robustness, making it appropriate for everyday wear as well as for formal commissions.

The cutting style is a mixed brilliant cut, a deliberate combination of step cutting on the crown or pavilion and brilliant facets elsewhere, designed to optimize both color and scintillation. The cushion outline benefits from a rounded rectangular girdle profile, and the proportions yield a measured depth of approximately 65 percent when depth is considered against the mean diameter, a proportion that supports saturated color while maintaining lively return of light. The crown faceting strategy preserves color saturation through larger facet planes near the table, while smaller pavillion and crown star facets introduce scintillation and flash. This balance is why mixed cuts are favored in colored gemstones, especially corundum, when the cutter must retain as much rough weight as possible yet still achieve lively dispersion and contrast. The excellent polish reported on this item enhances facet crispness, allowing facet junctions to reflect cleanly, and thereby maximizing visual performance under both directional and diffuse lighting.

Color is the defining attribute in any sapphire, and this stone exhibits vivid color intensity with a medium to medium dark tone, and high saturation that reads as a pure, vivid blue in both natural daylight and controlled gallery lighting. The Ceylon origin informs the character of the blue, offering a clarity of hue that is often described as bright and slightly luminous, rather than overly dark or overly inky. Optical behavior typical of corundum is present here, including pleochroism, where the sapphire displays subtle variations in blue tones when rotated, an effect that can be exploited by setting orientation to emphasize the preferred face up color. From a gemological perspective, corundum refracts light with a refractive index which commonly falls in the range of 1.762 to 1.770, and has a specific gravity around 4.00, properties that contribute to the gems apparent brilliance and heft on the finger or in a pendant. The heat treatment cited for this sapphire is a controlled thermal exposure, commonly used to remove or alter microscopic silk and to homogenize color distribution, a permanent enhancement that is fully stable under normal wear and routine jewelry maintenance.

From a design and wearing perspective the sapphire is highly versatile, equally at home in casual daily pieces and in elevated formal designs. In a solitaire engagement ring the intense mid tone will present as a focused, elegant center, especially when paired with a fine polished bezel or a delicate prong setting that allows light ingress from multiple directions. In cocktail or statement pieces the cushion outline and mixed brilliant faceting give a lively mix of broad color planes and sparkling facets, making the gem noticeable from across a room without appearing coarse under close inspection. Metal pairings can be selected to accentuate different attributes, 18 karat white gold or platinum will emphasize the stones cool saturation and scintillation, while 18 karat yellow gold or rose gold will warm the presentation and can create a vintage aesthetic. The size and proportions also make the stone suitable for custom three stone, halo, or halo with split shank settings, designs that leverage the stones clarity and mixed faceting to produce a strong visual centerpiece.

As representatives of The Natural Sapphire Company we disclose provenance and enhancements transparently, and we assist clients in selecting settings that protect and showcase the sapphires virtues. The combination of weight, cushion outline, mixed brilliant faceting, very very slightly included clarity at eye level, vivid color intensity, excellent polish, heat treatment, and Ceylon origin constitutes a balanced offering for connoisseurs and for buyers seeking a lasting, wearable gem. Practical care advice includes routine inspection of the setting to ensure secure claws or bezel, gentle cleaning with warm soapy water and a soft brush, and avoidance of extreme thermal shocks and harsh chemical exposure which are unnecessary given the stones stable enhancement. For those considering a commission we provide guidance on orientation to optimize face up color and recommendations for mounting that minimize light obstruction while ensuring security for daily wear, and we welcome inquiries for additional photographic views, laboratory documentation, and custom design consultations.