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

One transparent 1.50 carat oval bi color parti sapphire, measuring 7.33 x 5.57 x 4.40 mm, presented in a faceted mixed brilliant cut, demonstrates meticulous lapidary control and optical optimization. The mixed brilliant design combines a carefully calculated brilliant facet arrangement on the crown with a modified pavilion geometry to balance return of light and color distribution across the table. Facet junctions are executed with precision and the excellent polish ensures minimal surface diffraction, so that each pavilion and crown facet interfaces crisply, preserving sharp light return and controlled scintillation. The dimensions and oval outline provide an ideal face-up spread for the carat weight, maximizing apparent size while maintaining proportional depth for optimal refractive performance.

Color grading indicates intense color intensity with a clear bi-color parti expression, and the cutting strategy emphasizes the natural dichroism inherent in Ceylon sapphires. The mixed facet architecture intentionally channels light into alternating zones, producing discernible shifts between cooler blue tones and warmer secondary hues across the face of the gem, a quality prized by connoisseurs of parti sapphires. Clarity is graded slightly included, evaluated at eye level, and the stone remains transparent. The slightly included grade reflects minor internal features that are discreet at normal viewing distances and do not materially interfere with light transmission. Because the polish and facet symmetry are of high quality, those inclusions remain subordinate to the gem’s overall brilliance, and they can provide a natural signature without compromising durability or the purity of color. The result is a dynamic interplay of flashes and color windows that reads as controlled, lively, and complex from multiple viewing angles.

Sourced from Ceylon Sri Lanka and presented in its natural state with no enhancement, this sapphire exhibits the provenance and untreated character that discerning buyers seek. The flawless execution of the cutting and polish elevates the material’s intrinsic qualities, turning the stone’s bi-color nature into an engineered visual asset that performs consistently in different lighting conditions and mounting orientations. Offered by The Natural Sapphire Company, this oval parti sapphire is particularly well suited for bespoke settings where facet alignment and pavilion depth can be matched to a specific design, ensuring that the gem’s technical virtues—proportion, facetology, color dynamics, and surface finish—are preserved and showcased to maximum effect.