4.52 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 4.52 carat radiant shape blue sapphire from Ceylon, supplied with a GRS certificate, exhibits a vivid blue Royal Blue tone with transparent body and exceptional visual depth, measurements 10.83 x 7.07 x 5.40 mm. Cut as a radiant, the pavilion and crown geometry combine step like elements at the shoulders with brilliant facet patterning across the crown to optimize face up brilliance while preserving the deep, saturated blue that defines a Royal Blue sapphire. The stone is eye clean at normal viewing distances, evaluated at eye level, allowing the color to present without visible inclusions, and the excellent polish and symmetrical faceting produce crisp facet junctions and consistent light return across the table and pavilion facets. Treatment is standard heat, applied to enhance color uniformity and clarity, and the heat treatment is stable and permanent under normal wear conditions.

From a setting and use perspective this sapphire is engineered to perform in both casual and formal contexts, its 5.40 mm depth and rectangular outline lending itself to a range of mountings from bezel and low profile solitaire designs suited for everyday wear to elevated multi stone or halo settings for evening and formal presentation. The radiant faceting yields broad flashes of blue and cooler blue secondary tones, providing attractive pleochroic behavior when viewed at different angles, which enhances movement and interest whether set in a minimal daily ring or a high glamour cocktail piece. Given corundum hardness of nine on the Mohs scale, this gemstone is highly suitable for rings and bracelets with appropriate protective settings, and its eye clean clarity supports open settings that maximize light entry and color saturation. The Natural Sapphire Company offers this GRS certified Ceylon Royal Blue sapphire as a versatile centre stone for bespoke commissions or ready settings, and our gem specialists can advise on mounting options and metal pairings to balance contrast and light performance, ensuring you achieve the intended look for both everyday elegance and formal impact.