1.71 Ct. Bi Color / Parti Sapphire from Ceylon (Sri Lanka)

This transparent 1.71 carat oval bi color parti sapphire measures 7.06 x 5.58 x 4.74 mm, and its proportioning and mixed brilliant faceting make it especially suited for precision custom jewelry work. The mixed brilliant cut combines a brilliant style crown with a modified pavilion, producing strong scintillation from the crown facets while maintaining depth and color saturation through the pavilion planes. The table facet is calibrated to balance light return with color display, and the pavilion depth at 4.74 mm supports controlled light leakage that enhances the parti effect. Clarity is graded very slightly included at eye level, which means minute internal features do not interfere with faceting symmetry or with secure bezel or prong settings, and the excellent polish across facet junctions ensures crisp light reflections and maximum surface brightness.

Coloration is intense, showing a classic Ceylon parti presentation with distinct zones and a pleasing interplay between yellow green and blue tones, and the stone demonstrates pleochroic behavior that responds predictably to orientation in a mounting. The heat treatment applied is consistent with industry practice to optimize hue and clarity, while preserving natural zoning and overall integrity. For the custom jeweler, the oval outline at this size offers versatile design compatibility, it seats reliably in classic four or six prong heads, and it adapts well to low profile bezels or articulated halo settings without significant reworking of the pavilion. The 7.06 x 5.58 mm footprint is ideal for engagement ring centers where finger ergonomics matter, and it also scales effectively as a focal stone in pendants or asymmetric multi stone layouts.

At The Natural Sapphire Company we evaluate each facet orientation and girdle symmetry to guide setting recommendations, and this piece benefits from that attention to detail. Designers seeking to emphasize the parti color should consider a setting that allows rotation to harness pleochroism, and those prioritizing brilliance can opt for micro prong placement with a high crown bezel to increase perceived fire. The combined attributes of weight, oval dimensions, mixed brilliant cut, intense color intensity, very slightly included clarity, excellent polish, heat treatment, and Ceylon origin make this sapphire a technically refined choice for bespoke jewelry projects.