1.19 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 1.19 carat oval blue sapphire measures 6.96 by 5.07 by 3.99 millimeters and originates from Ceylon Sri Lanka, presented by The Natural Sapphire Company. The stone is faceted with a mixed brilliant cut, exhibiting an intense color intensity and a clarity graded as very very slightly included when evaluated at eye level. The cutting style pairs a brilliant facet arrangement on the crown with a carefully proportioned step influenced pavilion, and the result is a lively balance between face up color saturation and optical return. Heat treated to stabilize and intensify hue, the sapphire benefits from an excellent polish and precise symmetry, characteristics that preserve transparency and minimize light leakage through surface diffusion. The overall proportions and the oval outline produce an elegant face up spread for the carat weight, allowing the 1.19 carat gem to read larger to the eye while maintaining depth for internal light performance.

Technically, the mixed brilliant approach here optimizes the interplay between refractive index and facet geometry, maximizing internal reflection while controlling color saturation. Corundum refracts light at a refractive index near 1.762 to 1.770, which yields a critical angle in the mid 30 degrees range, and the pavilion facet angles on this cutting configuration are set to favor total internal reflection for incident light within that envelope. The relatively moderate table and a balanced crown height increase return of white light and scintillation, while the step influenced facets on the lower half enhance directional contrast and reinforce the stone surface color, producing the intense blue seen in these images. Excellent polish reduces microfacet scattering, sharpening facet junctions and increasing specular highlights, and the very very slightly included clarity at eye level means inclusions do not interrupt the primary light paths, supporting both brilliance and saturation. The mixed brilliant cut also mitigates pleochroic shifts common in sapphire by distributing color across multiple pavilion facets, creating a consistent visual tone from different viewing angles. For settings that emphasize optical performance, this oval sapphire will display strong flash and measured depth, making it well suited to east west as well as classic north south mounting orientations, and exemplifies the careful cutting and finishing standards upheld by The Natural Sapphire Company.