1.57 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This cushion shape, transparent blue sapphire weighs 1.57 carat, and measures 6.95 x 6.46 x 3.91 mm, the cutting style is faceted with a mixed brilliant cut that combines a brilliant crown with a step inspired pavilion to maximize both color and scintillation, clarity is graded as eye clean, evaluated at eye level, and the surface finish is an excellent polish that allows crisp facet junctions and superior light return. The stone is heat treated, a widely accepted and stable enhancement in the trade that intensifies and stabilizes the blue tone without compromising durability, and its reported origin is Ceylon, Sri Lanka, a historical source known for producing sapphires with lively blue character and exceptional market recognition. As corundum, the sapphire sits at nine on the Mohs scale, offering outstanding toughness for everyday wear, and its refractive index around 1.76 gives it a strong vitreous luster, while its low dispersion means it displays more focused flashes of white light and color rather than the rainbow fire typical of stones with higher dispersion.

When comparing brilliance to more common gemstones, it is useful to consider how mixed brilliant facet architecture and excellent polish influence performance versus pure brilliant cut stones or step cuts. Compared with diamond, which has a higher refractive index and stronger dispersion and therefore greater fire, this sapphire will show less spectral fire but more saturated, lively blue flashes because the stone’s intense color and precise facet angles favor color return and scintillation over prismatic dispersion. Versus aquamarine and blue topaz, which often present paler, more washed out blue tones, this sapphire stands apart because its intense color saturation produces a depth and presence that makes the stone read boldly in hand and on the finger. Compared with emerald, which often exhibits surface reaching fissures and lower toughness, the sapphire combines exceptional durability with eye clean clarity, meaning fewer inclusions distract from the stone’s surface reflections and internal light performance. The cushion shape with mixed brilliant cutting produces broad flashes and pinfire scintillation that interact with the rich Ceylon blue, yielding a visual experience that balances lively sparkle and deep, even color, making it a more compelling choice for a center gem that must perform in varied lighting.

For the educated buyer, several specific factors make this 1.57 carat Ceylon sapphire a valuable and sensible acquisition, these include verifiable origin, transparent disclosure of heat treatment, eye clean clarity at viewing distance, substantial weight for its class, and an excellent polish and facet symmetry that preserve light efficiency and aesthetic appeal. Ceylon provenance commands recognition among collectors and designers because Sri Lankan sapphires historically produce luminous, bright blues that are highly desirable in the market, and heat treatment in Ceylon is a long established, stable practice that enhances natural color rather than masking it. The gemological profile suggests a stone that will wear day to day without undue risk of abrasion or cleavage, and the cushion format offers design flexibility from classic solitaire engagement rings to halo and three stone settings. From an investment and liquidity perspective, a well cut, intensely colored, eye clean sapphire from Sri Lanka is easier to market than heavily included or unclear stones, and The Natural Sapphire Company stands behind full disclosure and provenance information to support resale and certification by an independent laboratory if desired. If you are seeking a sapphire that delivers vivid color presence, excellent craftsmanship in the cut and polish, and practical durability for continuous wear, this stone is an exemplary choice that combines aesthetic impact with the technical attributes that connoisseurs and informed buyers prioritize.