1.66 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent blue sapphire weighs 1.66 carats, with precise dimensions of 7.31 by 5.97 by 4.63 millimeters, presented in an oval shape with a mixed brilliant cut. The cutting style balances the pavilion facets of a brilliant cut with the crown distribution of a step oriented profile, yielding notable light return and lively scintillation across the face of the stone. Clarity is graded as very very slightly included, evaluated at eye level, which means the stone presents minimal internal features that do not detract from visual purity when worn. Color is classified as intense, showing a saturated, vibrant Ceylon blue that remains bright under a range of lighting conditions. The finish is an excellent polish, delivering crisp facet junctions and a smooth, reflective surface. Enhancement by heat treatment is disclosed, consistent with established industry practice to stabilize and intensify natural color. The documented origin is Ceylon, Sri Lanka, a source renowned for producing sapphires with clarity, brightness, and lively blue tones.

When compared to historically famous sapphires, this Ceylon example occupies a distinct and practical position. Kashmir sapphires from the late 19th and early 20th centuries are celebrated for a velvety cornflower blue and a soft diffusion of light produced by fine silk inclusions, qualities that are relatively rare and command high collector value. By contrast, this stone shows a clearer, more transparent character with intense saturation and stronger facet definition, which promotes brilliance rather than the velvet effect. Compared with large museum stones such as the Logan Sapphire or the Stuart Sapphire, which are notable for their exceptional size and deep royal blue hues, the present 1.66 carat gem offers everyday wearability and versatility, preserving the rich blue associated with Sri Lankan material while remaining suitable for refined, contemporary settings. The Star of India is celebrated for its size and asterism, a star effect produced by oriented needle inclusions, a phenomenon not present here. That distinction underscores this sapphire s unique value, which lies in its combination of saturated Ceylon color, high transparency, and a cutting style that maximizes brilliance for modern jewelry rather than emphasizing rare phenomena or museum scale.

The measured attributes of this sapphire translate into practical advantages for design, durability, and long term enjoyment, as represented by The Natural Sapphire Company. At 1.66 carats, the gem occupies a scale that allows a variety of mounting choices from a classic solitaire engagement ring to more intricate halo or three stone designs, while maintaining comfortable wear and balanced proportions on most hands. Heat treatment, when performed and disclosed, is a stable and accepted enhancement that improves color and clarity without compromising structural integrity, provided routine care is observed. The excellent polish and precise facet symmetry ensure consistent light performance and strong eye appeal, while the very very slightly included clarity grade indicates that inclusions are minor and do not interrupt the stone s overall visual impact. Its Ceylon origin adds provenance that aligns with a long history of Sri Lankan sapphires in crown jewels and private collections, yet the stone s characteristics also make it uniquely suited for contemporary use, offering a vivid blue that reads as both classic and immediate. In summary, this 1.66 carat Ceylon blue sapphire represents a balanced proposition between historical resonance and practical jewelry application, delivering intense color, commendable clarity, and refined cutting, attributes that reflect the quality standards upheld by The Natural Sapphire Company.