5.03 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 5.03 carat cushion shape blue sapphire measures 10.15 x 7.75 x 6.08 mm, and is cut in a mixed brilliant arrangement to balance strong light return with a broad, even table. The stone displays vivid color intensity and an excellent polish, with a clarity grade of very slightly included at eye level. Origin Ceylon Sri Lanka and enhancement by standard heat treatment are noted, and the combination of origin and cutting style produces a lively, open appearance with distinct facet reflections and well defined scintillation. The mixed brilliant pavilion maximizes internal reflection while the cushion outline softens flash patterns into broad flashes, yielding a visual character that reads as both bright and deep, depending on viewing angle and lighting conditions.

When compared to other gemstones in its category this sapphire’s reflective qualities are notable for corundum. Corundum has a refractive index around 1.76 to 1.77, which gives sapphire greater brilliance and more pronounced facet contrast than stones with lower refractive indices such as spinel at about 1.71 and tanzanite at about 1.69 to 1.70. Within the sapphire family the Ceylon provenance often produces a lighter, more transparent expression than the velvety, high saturation appearance associated with classic Kashmir or some Burmese material, and that transparency promotes more immediate light return and crisper reflections. The excellent polish on this stone preserves sharp facet junctions and enhances luster on the surface, while the very slight inclusions do not materially impede light performance at normal viewing distances. For settings where both durability and sustained brilliance are desirable, this sapphire’s hardness and finish make it suited to frequent wear, and it represents the type of balanced reflective performance The Natural Sapphire Company selects for clients seeking clarity of color and precision of cut.