4.13 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 4.13 carat oval blue sapphire from Ceylon Sri Lanka presents with precise proportions and a refined cutting profile, measuring 11.20 x 8.18 x 5.56 mm, and finished in a mixed brilliant cut. The cutting style combines a faceted crown and pavilion configuration that optimizes light return while maintaining an elegant oval outline. The stone is heat treated, with an intense color intensity and an excellent polish, characteristics that contribute to strong saturation and lively surface reflections. Clarity is graded as very slightly included evaluated at eye level, indicating minimal inclusions that do not detract from the overall transparency or structural integrity. The Natural Sapphire Company has documented these attributes to provide a clear technical profile for use in bespoke jewellery settings.

Under varied lighting conditions this sapphire demonstrates distinct but consistent behavior, owing to its cut, clarity, and intense color. In bright natural daylight the stone displays a vibrant medium to deep blue with crisp facet reflections and a broad, even color field across the table, producing noticeable brilliance and a cool, luminous tone. Under warm incandescent lighting the blue takes on a subtly softened hue with slightly warmer undertones and increased depth, making the color appear richer and more saturated. In modern white LED lighting the mixed brilliant cut surfaces yield high contrast scintillation, with pinpoint flashes from the facet junctions and a lively play between lighter and darker blue areas. In subdued or low light the excellent polish and internal clarity preserve a clear blue presence with moderated sparkle, while direct strong spot lighting produces intense internal fire and distinct facet contrast, enhancing the gemetic geometry. These responses make the sapphire versatile in both daytime and evening wear, and suitable for settings that either emphasize broad color or facet driven brilliance.