3.13 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 3.13 carat radiant shape Ceylon blue sapphire from The Natural Sapphire Company presents a precisely executed radiant cut, with finished dimensions of 7.87 by 7.38 by 5.64 millimeters. The radiant cut combines a modified step outline with brilliant facet arrays on both the crown and pavilion, producing a hybrid performance that balances scintillation and broad flash. The pavilion facet geometry and trimmed corners are optimized to increase light return in a square to slightly rectangular outline, and the excellent polish delivers crisp facet junctions and minimal surface disturbance. With a measured depth of 5.64 millimeters representing approximately seventy four percent of the average of the length and width, the cutting choice leans toward a slightly deeper pavilion, which intensifies color saturation while preserving lively internal reflection. The table and crown proportions were controlled to avoid washout under strong light, and the girdle finishing exhibits even thickness and careful faceting around the corners, enabling secure bezel or prong settings without compromising symmetry or durability.

Color and clarity are central to this stone, the sapphire displaying an intense blue color intensity characteristic of high quality Ceylon material, with subtle violet undertones that enrich the perceived saturation under varied lighting. The radiating facet architecture of the radiant cut complements the pleochroic nature of corundum, channeling both the blue and the slightly violet components into a uniform face up appearance, a result further enhanced by expert heat treatment. This stone has been heat treated to stabilize and intensify hue and saturation, a standard and widely accepted enhancement which in this instance produces stable color that will persist under normal wear conditions. Clarity is graded as very very slightly included at eye level, indicating that inclusions are minute and do not interrupt transparency or light transmission when viewed without magnification, and the stone remains visually transparent with excellent brilliance and contrast. The overall finish, including facet symmetry, polish, and absence of significant surface-reaching fractures, supports strong light performance and a clean, lively table image.

From a durability and performance perspective, this sapphire is a corundum species and rates nine on the Mohs scale of mineral hardness, making it one of the hardest gem materials available after diamond which rates ten. Compared to common jewelry minerals, the sapphire is substantially more resistant to abrasive wear than topaz which rates eight, and far more so than quartz which rates seven, translating to superior resistance to scratching in everyday use. Corundum has no true basal cleavage, and in practice demonstrates good toughness for set stones, meaning the risk of cleavage related breakage under normal setting and wear is low, while standard care to avoid severe impacts is still recommended. The combination of a nine on the Mohs scale, excellent polish, and professional facet finishing makes this 3.13 carat radiant sapphire an excellent candidate for daily wearable pieces such as engagement rings or pendants, particularly when set with protective prongs or a low bezel profile to safeguard the table and corners. The Natural Sapphire Company stands behind the origin disclosure and treatment statement, and can advise on ideal mounting styles that preserve the stone integrity, maximize face up color, and ensure long term wearability.