0.71 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This sapphire presents as a transparent, round faceted gem weighing 0.71 carat, with calibrated dimensions of 5.32 by 5.34 by 3.22 millimeters. The cutter employed a mixed brilliant design, combining a standard brilliant type crown with a modified pavilion architecture to optimize both scintillation and color saturation. Measured against its average diameter the pavilion and crown depth yields a depth ratio of approximately 60.4 percent, a proportion that indicates a deliberately deep pavilion plane engineered to retain intense color rather than maximize white light return alone. Facet junctions are executed with precision, the polish is graded excellent, and symmetry is consistent across crown and pavilion arrays, which together produce strong facet contrasts and crisp light return when examined under a standard diffused light source.

Color grading for this stone is in the intense category, and the material exhibits the rich blue that collectors associate with fine Ceylon sapphires. The hue is a classic Ceylon blue, with strong saturation and a medium to slightly deep tone that responds well to both daylight and incandescent lighting. The mixed brilliant cutting strategy enhances the color by using a brilliant crown to impart lively scintillation on the table and upper facets, while the modified pavilion planes direct light back through the body of the gem to deepen the visual color. This approach reduces the risk of a washed out or windowed appearance in a modestly sized stone like this example, and it allows the sapphire to appear visually larger and more vivid when set.

Clarity is described as slightly included, evaluated at eye level, which is common for natural sapphires and does not materially compromise structural integrity. The inclusions are localized and do not form continuous lines or fractures, they are mostly internal and have been taken into account during the cutting process so that facet placement minimizes their visibility through the table. The gem has undergone standard heat treatment, a stable and widely accepted enhancement practiced to improve blue hue uniformity and to partially heal silk and other crystal imperfections. No evidence of diffusion or glass filling is present, and the heat treatment was applied in a controlled fashion to preserve crystal zoning and to retain the natural origin signature. Origin is Ceylon Sri Lanka, a provenance with a long documented history of producing sapphires prized for their vibrant blue and crystalline clarity.

The gemological and historical context is an important part of this stone s appeal. Sapphires from Sri Lanka have been used historically in ceremonial and devotional jewelry, they were set into royal regalia and monastic ornaments, and they have long been valued as talismans for protection and wisdom. This 0.71 carat round sapphire, with its precise mixed brilliant cut and intense Ceylon blue color, continues that lineage as a versatile component for contemporary and traditional settings. For practical mounting considerations the 3.22 millimeter depth will sit slightly deep relative to average table planes, therefore a low profile four prong setting or a subtle bezel that allows the crown facets to read freely will showcase the stone s brilliance while protecting the girdle. At The Natural Sapphire Company we can advise on proportionate settings and provide high resolution imagery and mounting simulations to ensure the optical performance observed under loupe and natural light is preserved in the finished piece.