0.93 Ct. Purple Sapphire from Ceylon (Sri Lanka)

This transparent oval purple sapphire weighs 0.93 carat and measures 7.05 x 4.85 x 3.14 mm, presented in a classic faceted form with a mixed brilliant cutting style. The mixed brilliant configuration combines a brilliant faceted pavilion with a modified crown whofaceting pattern that prioritizes scintillation while preserving face up color. Clarity is graded as very slightly included, evaluated at eye level, which indicates minor crystal inclusions that do not obstruct the table view or compromise structural integrity. The color is described as medium intensity purple, showing an even saturation consistent with high quality Ceylon material. The polish on every facet is excellent, producing clean facet junctions and minimal surface scattering. No enhancement has been performed on this stone, and the origin is Ceylon Sri Lanka, a locality renowned for producing sapphires with lively, pastel to medium tones and high transparency. The depth of 3.14 mm yields a depth ratio of approximately 53 percent relative to the average of the length and width, a proportion that balances color saturation and light return for an oval mixed brilliant.

From an optical perspective this sapphire benefits from the intrinsic properties of corundum. Corundum has a refractive index in the range of approximately 1.76 to 1.77, and a birefringence on the order of 0.008 to 0.009, giving a single crisp facet image with only modest doubling. Dispersion in corundum is low, around 0.018, so the stone exhibits controlled fire and a focus on white light return and scintillation rather than spectral flashes. The hardness of nine on the Mohs scale and a specific gravity near 4.00 contribute to a durable, stable material that polishes to a high luster and maintains facet crispness over time. The mixed brilliant cut used here exploits corundums optical constants by arranging brilliant facets to maximize return from the pavilion and by maintaining crown angles that favor balanced light leakage and face up brightness. The medium color intensity in this particular stone has been judged against the cut proportions and facet geometry to allow maximum dispersion of light through the body color without creating windowing or excessive dark zones.

When compared to other gemstones in the same appearance category, this purple sapphire displays distinct reflective characteristics. Against color quartz varieties such as amethyst, which have a refractive index near 1.54, the sapphire returns light with noticeably greater brilliance and crisper facet outlines because of corundums higher refractive index and greater luster. Compared with spinel, which is often chosen as a color rival to sapphire, the sapphire shows a slightly stronger white light return because spinel typically has a marginally lower refractive index, resulting in softer highlights. Against garnet species that can show strong dispersion and thus more vivid fire, the sapphire trades off that spectral play for higher overall brilliance and a cleaner, more even scintillation pattern. Compared with tanzanite, which is strongly pleochroic and can display color change with viewing angle, the sapphire shows less pleochroism and therefore more uniform face up color and consistent reflections, which is an advantage for designs that require color stability. Within the corundum family itself the reflective behavior of this Ceylon origin sapphire differs from classic Kashmir sapphires that are known for a velvety light scattering and rich saturation. The Ceylon material tends to be lighter in tone and more transparent, producing a livelier, more brilliant appearance with quicker scintillation. Untreated Ceylon stones like this one preserve natural inclusions and growth features that can subtly influence light diffusion, maintaining a balance between sparkle and the softer, velvety quality prized by connoisseurs.

The finishing and craftsmanship amplify the stones optical performance. The mixed brilliant faceting has been implemented with tight symmetry and well proportioned facet angles to create a controlled light return pattern that reads lively at typical viewing distances. Excellent polish ensures that facet planes act as effective mirrors, minimizing surface scatter and allowing internal reflections to contribute to contrast and sparkle. Crisp facet junctions reduce the tendency for light leakage at edge facets and reinforce strong contrast patterning during movement. The girdle has been carefully finished to avoid excessive thickness that could hide weight, while still protecting the pavilion edge from wear. Because the clarity is very slightly included at eye level, the cutter optimized facet placement to avoid inclusions in primary light paths, preserving both brilliance and color uniformity. For buyers comparing reflective performance within the purple gemstone category, this sapphire offers a technical advantage through its combination of corundum optical properties, well controlled mixed brilliant faceting, and excellent surface finish. The result is a stone that displays brisk scintillation, defined facet reflections, and a saturated medium purple that reads consistently in jewelry applications. The Natural Sapphire Company presents this 0.93 carat oval purple sapphire as an example of untreated Ceylon material where cutting precision and material quality come together to offer a technically excellent and visually engaging gem.