1.70 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 1.70 carat oval sapphire from Ceylon Sri Lanka, presented by The Natural Sapphire Company, exhibits a transparent body with a vivid Royal Blue color intensity, precise dimensions of 8.37 x 5.58 x 3.93 mm, and a mixed brilliant cut executed to showcase both depth and brilliance. The gem is certified Other Blue Royal Blue, heat treated to optimize color and clarity, and graded slightly included when viewed at eye level. The oval outline was chosen to balance face up color saturation with an elegant spread on the finger, while the proportions and table size maintain a strong return of light. Excellent polish across all facets ensures minimal surface diffusion, so the stone presents a crisp, lively appearance under direct illumination, and the facet junctions appear clean and well executed in loupe and photographic study.

The mixed brilliant cut on this sapphire combines a faceted crown with a pavilion that integrates both brilliant and step cutting philosophies, producing a controlled interplay between scintillation and overall light return. The crown facets are arranged to catch and break incident light into rapid, lively flashes, while the pavilion facets have been calibrated to channel that light back through the table without excessive leakage. This balance results in bright, pinpoint scintillation when the stone moves, together with a steady, saturated face up color that communicates depth. In oval form, careful attention to symmetry and facet alignment minimizes bow tie effects, and the cutter has centered the table and crown facets to reduce dark zones. The faceting scheme also moderates pleochroic shifts, so the viewer sees a consistently vivid blue from multiple viewing angles, rather than scattered or uneven color patches.

Clarity and enhancement history play an integral role in how the cut interacts with light in this sapphire. Slightly included clarity at eye level indicates the presence of natural internal features that are visible without magnification, yet the cutter has oriented the crystal so that inclusions are either positioned toward the girdle or integrated within facet junctions to minimize impact on brilliance. Heat treatment has been used to intensify hue and improve transparency, a standard and stable enhancement for Ceylon sapphires, and the result is improved diffusion of blue wavelengths while preserving the gemogenic texture that identifies origin. The vivid color intensity on this stone reads as a saturated royal blue, a tone and saturation combination that the mixed brilliant cut amplifies by concentrating color toward the center and allowing lighter blue reflections at facet edges. The result is a three dimensional color performance, where flashes and areas of intense color coexist, offering both sparkle and the deep velvety saturation collectors seek.

From a craftsmanship and practical perspective, this sapphire demonstrates technical precision that will appeal to discerning buyers. The pavilion depth and crown height are balanced to yield maximum return of light for the given carat weight and oval spread, and excellent polish reduces surface haze for optimal contrast between bright and dark facets. The cutter retained sufficient weight to preserve desirable depth and saturation, without over deepening the pavilion which would reduce face up presence. For setting recommendations, this stone is ideal for a four or six prong head, or a bezel with a fine profile to expose the crown and allow light ingress, and the oval shape lends itself to classic solitaire or halo configurations that enhance perceived size and color. Certification accompanies the sapphire, and The Natural Sapphire Company stands behind its provenance, treatment disclosure, and grading. We welcome requests for additional images under controlled lighting, facet maps, or mounting mock ups to evaluate how the precise faceting will perform in your chosen design, and we will provide guidance on setting and care to maintain the sapphire s brilliance over time.