4.61 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 4.61 carat oval blue sapphire measures 10.63 x 8.72 x 5.95 mm, and displays a mixed brilliant cut that combines a faceted brilliant crown with a modified pavilion geometry to maximize return and color saturation. The cutter has maintained a moderately sized table and carefully angled bezel and star facets to promote lively scintillation while preserving depth of tone. Clarity is graded as very slightly included at eye level, which allows clean light passage and crisp facet junctions, and the polish is excellent, producing sharp mirror planes across the crown and facets. Heat treatment has been applied to stabilize and intensify the blue, consistent with standard trade practice for Ceylon material, and the gem originates from Ceylon Sri Lanka, a source known for lively cornflower to intense blue hues. The overall finish emphasizes precise facet symmetry and pavilion angles set to corundum refractive indices, which enhances internal light return and minimizes windowing in this size and oval outline.

When comparing reflective qualities within its category this sapphire demonstrates stronger brilliance and higher luster than typical blue spinel and tanzanite, due to corundum higher refractive index of approximately 1.76 to 1.77 and low dispersion. Against other blue sapphires the stone reads as intensely colored with a balance between body color and light return that is often more lively than many darker, heavily saturated stones that sacrifice brilliance for depth. Versus Burmese sapphires this Ceylon piece shows a slightly brighter, more sapphire blue expression with crisper facet reflection, and versus Kashmir material it presents more transparency and flash, rather than the velvety diffusion associated with that origin. Compared with blue topaz and iolite the sapphire delivers superior durability and more saturated reflected color under mixed lighting, with scintillation that remains consistent across viewing angles rather than shifting dramatically. At The Natural Sapphire Company we highlight this gem for settings that allow crown exposure to light, such as open prong or low bezel work, because its mixed brilliant faceting and excellent polish yield optimal sparkle and a clear, intensely blue appearance in daily wear.