0.81 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 0.81 carat round blue sapphire from Ceylon Sri Lanka is an exceptional example of natural corundum, presented by The Natural Sapphire Company. The stone measures approximately 5.65 by 5.56 by 3.18 millimeters, and it features a mixed brilliant cut that combines a faceted brilliant crown with a carefully faceted pavilion to balance sparkle and color. At eye level the clarity is graded as very slightly included, which means that inclusions are minimal and do not interrupt the stone’s overall transparency or visual appeal. The color reads as vivid in intensity, delivering a saturated yet lively blue that benefits from the gem’s transparency and cut. The polish is excellent, and importantly, the sapphire is untreated, with no enhancement recorded, a quality that is meaningful to informed buyers because it preserves the natural rarity, provenance, and long term value of the piece.

From a cutting and light performance perspective this gem is well proportioned, with a depth that supports good light return and scintillation without sacrificing face up color. The mixed brilliant cut is especially effective in sapphires when the cutter seeks to maximize scintillation while retaining strong color saturation, because the brilliant style facets on the crown create lively flashes of light, and the pavilion facets are arranged to direct that light back to the viewer. Excellent polish ensures that surface reflection remains crisp and bright, enhancing perceived luster and clarity. The very slightly included clarity grade indicates that any internal features are small and do not affect structural integrity, which preserves the sapphire’s durability for everyday wear. The origin of Ceylon Sri Lanka contributes to the stone’s desirability, because Ceylon deposits are renowned for producing sapphires with lively, saturated blues that show a distinct brightness compared with some other sources.

When comparing the reflective qualities of this sapphire to other gemstones in the same category it helps to consider both optical constants and cutting style. Corundum has a refractive index in the range of about 1.762 to 1.770, and a modest dispersion value, which results in strong brilliance and sharp facet reflections, but less fire than diamonds. In practical terms this means that a well cut sapphire like this one will return broad, vivid flashes of blue and white light, prioritizing color and scintillation rather than spectral fire. Compared to spinel, which has a slightly lower refractive index, this sapphire will generally appear more lively and display stronger contrast between light and dark facet areas. Compared to tanzanite, which exhibits trichroism and a different crystal habit, this sapphire offers greater permanence of color and more consistent reflection under varying lighting. Within the sapphire category, mixed brilliant cuts tend to show more scintillation than step cuts and more controlled color distribution than shallow briliants, while cabochons emphasize color depth at the expense of facet sparkle. Compared to renowned Kashmir sapphires which are prized for a velvety saturation, and Burmese sapphires which can be deeper and more saturated, Ceylon sapphires often balance saturation and brightness, producing a lively face up appearance that is especially attractive when the stone is well cut and well polished.

This gem represents a strong value proposition for collectors and connoisseurs who prioritize natural origin, no enhancement, and technical excellence in cutting and finishing. The combination of vivid Ceylon blue, mixed brilliant cutting, very slightly included clarity at eye level, and excellent polish results in a sapphire that delivers both visual impact and robust resale value. For buyers seeking a classic, transparent blue sapphire with verifiable provenance and untreated status, The Natural Sapphire Company is pleased to present this 0.81 carat round stone as a refined option for engagement rings, bespoke jewelry, or curated collections, where optical performance and natural integrity are equally important.