7.02 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This C.Dunaigre certified blue sapphire from Ceylon is a 7.02 carat, round faceted gem with dimensions 11.11 by 10.95 by 7.84 mm, presented by The Natural Sapphire Company. The cutting style is a mixed brilliant cut, combining a brilliant faceted crown with a more controlled pavilion faceting scheme to optimize both return of white light and controlled color saturation. The excellent polish ensures crisp facet junctions and minimal surface diffusion, while the slightly included clarity grade, evaluated at eye level, indicates fine natural features that do not materially impede face up performance. The medium color intensity is characteristic of quality Sri Lankan material, leaning toward a vivid yet lighter Ceylon blue, and the stone has undergone standard heat treatment to enhance tone and remove brownish components, a common and stable enhancement in trade practice.

Under different lighting conditions this sapphire demonstrates predictable and pleasing optical behavior. In strong daylight or cool white LED sources the mixed brilliant cut yields a broad field of lively blue flashes, with strong internal contrast between deep blue facets and lighter, scintillating areas, producing an overall appearance of lively brilliance and crisp facet definition. Under warmer incandescent or halogen lighting the gem displays deeper, richer blue centers and increased contrast, giving a more saturated face up color and pronounced near color flashes, while the excellent polish preserves sharp reflections. In lower ambient light the pavilion faceting maintains light return so the gem retains a discernible blue presence, and the slightly included nature can contribute to subtle internal light scattering that enhances scintillation without causing cloudiness. Viewing at oblique angles reveals mild pleochroic tendencies typical of corundum, with blue to bluish violet shifts as facets rotate, a quality that adds depth to the visual experience. This combination of size, mixed brilliant faceting, medium intensity color, and fine polish makes this Ceylon sapphire a technically satisfying choice for collectors and connoisseurs seeking strong light performance and classical Sri Lankan character.