1.09 Ct.Tw.Total Carat Weight Blue Sapphire Pair from Ceylon (Sri Lanka)

This matched pair of Ceylon blue sapphires presents a concise technical profile that reinforces their suitability as a high quality earring set. The stones weigh 0.61 carats and 0.48 carats respectively, and are fashioned into round shapes with dimensions 4.52 x 4.47 x 3.35 mm and 4.53 x 4.50 x 3.15 mm. Both gems are cut to a mixed brilliant style, combining a brilliant crown with pavilion faceting optimized for balanced light return. Clarity is graded as eye clean when evaluated at normal viewing distance, ensuring that no inclusions interrupt the visual field or distract from scintillation. Color is described as vivid, with strong saturation and pleasing tone consistent with fine Ceylon material. The polish is excellent, yielding crisp facet junctions and a highly reflective surface. Enhancement by controlled heat treatment has been applied to stabilize and intensify hue, a widely accepted and disclosure standard in the trade. The Natural Sapphire Company stands behind the origin attribution to Sri Lanka, and these stones reflect the classical Ceylon character of vibrant blue with lively medium to medium dark tone.

From a gemological and cutting perspective the mixed brilliant execution on these rounds is calibrated to maximize matched brilliance across the pair. The crown exhibits a proportionally sized table and crown angle arrangement that promotes top light entry and initial dispersion, while the pavilion faceting pattern is arranged to return light with controlled leakage. The near equality of diameter dimensions indicates careful preforming and finishing, allowing consistent pavilion depths and crown heights between the two stones. This proportional harmony translates into uniform scintillation frequency and consistent flash color when both sapphires are viewed together or when set in symmetrical earring positions. Optical constants inherent to corundum, including a refractive index around 1.762 to 1.770 and low birefringence in the order of 0.008 to 0.010, mean that precise facet alignment and excellent polish are required to achieve the lively brilliance evident in these stones. The excellent polish reduces surface scattering and enhances saturation perception, while the eye clean clarity grade ensures that internal features do not interrupt the path of reflecting facets.

For use in earrings the matching brilliance of these sapphires is their defining advantage. The combination of matched diameters, tuned mixed brilliant faceting, and uniform vivid color produces synchronized flash and balanced face up appearance when placed in paired settings. The small difference in weight is essentially compensated by the near identical diameters and proportional depths, so that visual weight is consistent to the eye, and the stones read as a harmonious pair. When mounted as prong set studs the mixed brilliant cut will present maximum table brightness and lively edge scintillation, while a well executed bezel setting can protect the girdle and preserve the uniform silhouette without sacrificing much of the optical performance. For designer bezel or halo applications the excellent polish and vivid color will interact favorably with metal color choice, with white metals emphasizing brightness and warm metals enriching the blue tone. From an acoustic wear perspective the stones sit at an optimal size for everyday studs, providing noticeable presence without excessive mass, and the eye clean clarity ensures comfortable visual engagement in close face to face conversation.

Provenance and treatment disclosure are integral to assessing quality and value, and these sapphires are identified as originating from Ceylon Sri Lanka, with heat treatment applied to enhance color and clarity stability. Heat treating is a standard practice for sapphire, and when executed properly it enhances color without introducing instability. The cutting and finishing here demonstrate careful human skill in preforming and faceting to produce matching optical behavior, and the result is a pair ready for precision earring manufacture. The Natural Sapphire Company offers these stones with full disclosure and provenance documentation, and our bench can advise on recommended mounting practices to preserve the optimal light performance demonstrated in the images. Routine care involves avoiding sudden thermal shock and strong acids, and periodic professional cleaning will maintain the polish and fire. If you seek a pair that combines technical cutting excellence, matched optical performance, and the characteristic vivid Ceylon blue, these mixed brilliant round sapphires offer an ideal foundation for a refined pair of earrings.