1.18 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 1.18 carat round blue sapphire from Ceylon Sri Lanka combines precise cutting geometry with strong material properties to produce a gem that is both technically refined and visually compelling. The dimensions measure 6.04 x 5.99 x 4.22 mm, yielding an average diameter of 6.015 mm and a depth of 4.22 mm, equivalent to a depth ratio of approximately 70.16 percent, a deliberate proportion that intensifies color saturation without compromising polish quality. The faceting is a mixed brilliant scheme, which employs a brilliant style on the crown to maximize facet scintillation, paired with step influenced pavilion facets to deepen color and enhance layered light return. Clarity is graded very very slightly included when evaluated at eye level, indicating inclusions are minimal and do not impede light transmission. The polish is excellent, providing crisp facet junctions and high surface lustre, and the stone has been heat treated in the customary manner for sapphires to optimize hue and tone. The Natural Sapphire Company presents this gem as an example of careful cutting and finishing applied to top quality Ceylon material.

From a reflective quality perspective the sapphire benefits from corundum optical constants, with a refractive index in the range of 1.762 to 1.770 and modest birefringence near 0.008, which together produce bright, well controlled internal reflections and sharp facet contrast. The intense color intensity of this piece, combined with the mixed brilliant cut and the deeper depth ratio, yields strong light return as saturated flashes of blue with tight scintillation across the crown. Compared to classic Kashmir sapphires, which often show a softer, velvety diffusion of light due to dense silk inclusions, this Ceylon example displays crisper facet flashes and more lively brilliance. Compared to Burmese material, which can present deeper, more homogenous saturation, this stone offers a brighter, more lively blue with greater sparkle. Against alternative blue gems commonly considered in the same category, such as spinel, tanzanite, or blue topaz, this sapphire exhibits superior hardness and higher refractive response leading to more persistent brilliance and resilience to wear. For buyers who value technical execution, color fidelity, and controlled light performance, The Natural Sapphire Company recommends this stone for settings that showcase its mixed brilliant geometry and concentrated Ceylon color.