3.10 Ct. Blue Sapphire from Madagascar

This transparent 3.10 carat cushion shape blue sapphire measures 9.58 by 7.33 by 4.78 millimeters, dimensions that yield a proportional depth of approximately 56.5 percent, a dimension range that balances color saturation with optimal light return. The gem has been fashioned in a mixed brilliant cut, employing a pavilion composed of brilliant style facets beneath a crown that carries modified step and brilliant elements to saturate the body color while preserving scintillation. The mixed brilliant architecture allows a larger table facet to present a vivid blue face up, while the pavilion facets are angled to direct light through the stone in a way that enhances dispersion without sacrificing color intensity. The sapphire exhibits vivid color intensity, a medium to medium deep tone with strong saturation that reads as a pure blue rather than shifting toward gray or green. The stone is heat treated, a stable and widely accepted enhancement applied to refine hue and clarity, and it displays an excellent polish that produces sharp facet junctions and strong facet contrast when examined under direct and diffused lighting.

The clarity grade is reported as very slightly included, evaluated at eye level, and those minimal internal features are best understood as the sapphire s fingerprints, unique identifiers that authenticate its natural origin and add to its individuality. At this grade, inclusions are typically small crystal inclusions, minute reflective platelets, or fine growth tubes that are readily apparent under magnification but do not materially obstruct the path of light when viewed without magnification. These micro features interact with the mixed brilliant faceting to produce subtle internal reflections that contribute to the stone s depth and liveliness. Rather than detracting from the gem, the inclusions serve as a mapped record of the sapphire s formation history, enabling gemologists to trace growth zoning, crystal habit, and healing patterns that are consistent with natural crystallization processes. In the case of stones from Madagascar, inclusion suites often include isolated crystals and delicate silk structures arranged in growth textures, and this sapphire s very slightly included grade suggests an inclusion pattern that, under loupe or microscope, will provide reliable internal markers for provenance and identification.

From the perspective of lapidary craftsmanship, this cushion sapphire demonstrates considered proportioning and careful finishing work, attributes that are central to the gem s appeal for collectors and connoisseurs. The cutter has exploited the mixed brilliant format to manage color saturation across the pavilion and crown, calibrating facet angles to avoid light leakage while maximizing face up color intensity. The excellent polish reported ensures that facet planes are free of polishing lines and haze, allowing the vivid blue to read cleanly in daylight and artificial lighting. For practical settings, the stone s depth and table size make it adaptable to both bezel and prong mounts, and settings in platinum or white gold will emphasize the strong blue saturation, while warmer metals can subtly alter perceived tone for different design directions. Heat treatment is stable under normal wear and cleaning, and routine care recommendations include avoiding prolonged exposure to caustic chemicals and ultrasonic treatment if significant internal fissures are present, which in this case are minor given the very slightly included grade. At The Natural Sapphire Company we document origin, treatment, and precise measurements, and we can provide detailed imagery and magnified views to assist in verification and selection. This cushion sapphire represents a technical balance of cut engineering, stable enhancement, and natural inclusion signatures, making it an excellent choice for patrons who value the measurable intricacies of fine sapphires and the distinct character that natural formation imparts.