0.90 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This oval 0.90 carat blue sapphire from Ceylon Sri Lanka measures 6.23 x 5.03 x 3.54 millimeters, a proportion set that yields a mean diameter of approximately 5.63 millimeters and a depth percentage near 63 percent. The gem is fashioned in a mixed brilliant cut, combining a brilliant style crown with a modified step pavilion, an approach that intentionally balances scintillation and color saturation. The brilliant crown facets contribute to lively white light return and crisp facet reflections, while the pavilion geometry is tuned to preserve the stone s natural intense blue, maintaining depth of hue through controlled light leakage and internal reflection. The cutting exhibits precise facet junctions and symmetry tailored to an oval outline, the girdle appears well controlled for secure setting, and the excellent polish produces sharp, mirror like facet surfaces that enhance both overall brilliance and the clarity of internal features under loupe examination.

Color grade is described as intense, a saturation level that situates this Ceylon sapphire in a range that reads vivid yet natural, with balanced tone that avoids both overly dark blocking and overly light washing. The mixed brilliant configuration is chosen to optimize that intensity, allowing the crown s scintillation to animate surface brilliance while the pavilion s modified steps accentuate the stone s intrinsic color zoning and rich blue body color. The gem has been heat treated, a standard, stable enhancement applied to Ceylon sapphires to refine color uniformity and reduce certain growth related features, the result is an even, appealing color distribution that remains consistent across typical lighting conditions. The excellent polish and well executed facet planes maximize the optical performance of the heat treated material, enabling strong return of color and lively movement under both incandescent and daylight balanced lighting.

Clarity is graded as very slightly included when evaluated at eye level, a designation that acknowledges the presence of natural internal features while confirming that they do not materially detract from the gem s apparent beauty to the unaided eye. The inclusions present in this stone are best understood as unique identifiers, intrinsic characteristics formed during crystallization that serve as natural fingerprints for origin verification and long term authenticity. Typical features observed include fine silk, minute crystal inclusions, tiny healed feathers, and subtle growth zoning, each contributing a microscopic topology that is diagnostic under magnification. Fine silk, composed of oriented rutile or similar needle like inclusions, can create a softening of light transmission that enhances perceived velvety color depth without compromising brilliance. Minute crystal inclusions act as pinpoint reflectors that assist gemological tracing and provenance assessment. Healed feathers and internal fissure patterns demonstrate the sapphire s growth history and thermal evolution, elements that are often correlated with materials from Ceylon Sri Lanka. These inclusions, when viewed with a loupe or microscope, confirm a natural origin and provide a record that is as important to collectors as external appearance, they lend character, they enable gemological identification, and they guarantee that no two stones are identical.

As presented by The Natural Sapphire Company this 0.90 carat oval blue sapphire is a technically refined example of Ceylon gem cutting and handling, offering a combination of precise mixed brilliant faceting, intense natural color, stable heat treatment, and a clarity profile that balances eye clean appeal with distinctive internal markers. The gem s proportions, near 63 percent depth and carefully considered crown to pavilion relationships, make it ideal for designs where color retention and lively surface brilliance are desired, such as solitaire rings with open settings or pendant mounts that allow light from the pavilion. The practical care profile is straightforward, routine professional cleaning and avoidance of extreme thermal shock preserve polish and color, and the natural inclusions should be regarded as part of the stone s dossier, features that enhance traceability and long term collectibility. For buyers and connoisseurs seeking a Ceylon sapphire that demonstrates refined cutting technique, authentic internal character, and a robust intense blue, this stone exemplifies the level of material and craftsmanship The Natural Sapphire Company sources and presents.