1.87 Ct. Purplish Blue Sapphire from Ceylon (Sri Lanka)

This gemstone is a 1.87 carat round shapely sapphire, with exact dimensions of 7.62 by 7.48 by 4.24 millimeters, presented in a mixed brilliant cut that has been executed to precise proportions. The cutter has combined a brilliant style crown with a modified pavilion geometry, producing a balanced depth to diameter ratio of approximately 56 percent, which is well suited to maximize both light return and even color distribution in corundum. The mixed brilliant approach allows the crown facets to break light into lively scintillation while the pavilion facets control return angles, preserving face up brightness without compromising saturation. Measurements show a near true round outline with minute variation across the girdle, an attribute that improves seatability in tension, prong, or bezel mounting and simplifies planning for symmetry critical engagement settings. The excellent polish and carefully formed facet junctions result in crisp facet facet intersections that support intense pinpoint highlights under direct light and broader flashes in diffuse lighting, a combination that creates visual depth and controlled dispersion that will read as lively rather than overbrilliant.

Color and clarity engineering in this sapphire align with classic Ceylon characteristics, offering a purplish blue hue at a medium light intensity that reads as soft violet infused blue under daylight and a slightly cooler tone under incandescent light. The color is uniform through the girdle plane, with no visible zoning at eye level, demonstrating a homogenous crystal chemistry and thoughtful orientation of the rough prior to cutting. Clarity is graded as very very slightly included at eye level, indicating that microscopic inclusions are present but are not observable to the unaided eye in normal viewing conditions, preserving transparency and minimizing light obstruction. The excellent polish further minimizes surface dispersion loss, ensuring internal reflections are efficiently returned to the viewer. The sapphire has been heat treated, a stable and widely accepted enhancement that optimizes color saturation and reduces silk inclusions without compromising the material integrity. Origin is Ceylon Sri Lanka, a provenance noted for producing sapphires with a combination of lively brilliance and delicate violet tones, and this piece displays the hallmarks of that region in both hue and light performance.

For an engagement setting, this sapphire offers an exceptional balance of technical performance and everyday durability. At 1.87 carats and with a round outline, the stone presents as a classic solitary focal point with sufficient face up size to command presence on a finger, while the mixed brilliant cutting style maintains scintillation in both solitaire and halo constructions. The dimensions permit a secure four or six prong seat that will highlight the round pavilion and crown geometry, and the modest depth supports both low bezel settings for enhanced wearability and raised prong mounts for maximum light intake. Sapphires rate nine on the Mohs hardness scale, and the robust cutting and excellent polish here make this stone suitable for continuous wear, resisting abrasion and maintaining facet crispness over time, ideal for the daily demands of an engagement ring. When set with diamonds, the medium light purplish blue offers a refined contrast to colorless accents, and the mixed cut preserves enough brilliance to balance well with brilliant cut side stones. The Natural Sapphire Company stands behind the gemstone with provenance and treatment disclosure, providing the technical detail discerning buyers require, and we can advise on mounting geometry, ideal prong placement, and complementary diamond specifications to integrate this 1.87 carat Ceylon sapphire into a ring design that emphasizes both gemological integrity and long term wear performance.