0.45 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 0.45 carat round blue sapphire from Ceylon Sri Lanka, presented by The Natural Sapphire Company, measures 4.59 by 4.59 by 2.94 millimeters, yielding a depth percentage of approximately 64 percent, consistent with well proportioned mixed brilliant cutting. The stone is faceted in a mixed brilliant style, where a brilliant faceted crown is paired with a modified step or pavilion to balance scintillation and overall light return. Clarity is graded slightly included at eye level, with internal features that are minor and positioned so as to have minimal impact on light transmission. Color intensity is described as intense, with a saturated yet bright blue that benefits from a professional heat treatment enhancement. The polish is excellent, producing crisp facet junctions and mirror like surfaces that maximize specular reflections and sharp scintillation under direct light, while the mixed brilliant geometry encourages a lively mix of small flashes and larger light return windows ideal for finger wear.

Optically, corundum exhibits a refractive index approximately 1.76 to 1.77 and a low dispersion near 0.018, and this sapphire demonstrates the classic corundum balance of strong luster with restrained fire. In comparison to other blue sapphires, this Ceylon example tends toward a more vivacious, light reflective behavior when well cut, differing from the velvety diffusion often favored in Kashmir material which scatters light to produce a softer glow rather than pronounced facet scintillation. Compared with Burmese sapphires, which typically show deeper saturation and intense face up color that can emphasize contrast and mirror like reflections, this Ceylon sapphire presents a brighter, more lively facet pattern, particularly valuable in smaller sizes where light return dynamics dominate perceived brightness. Against other blue gemstones that buyers may consider, such as spinel and tanzanite, this sapphire displays higher refractive brilliance than spinel, whose lower refractive index yields a gentler sparkle, and it lacks the strong pleochroism of tanzanite which changes color and can appear less uniformly reflective. Compared with diamond which exhibits much higher dispersion and scintillation, this sapphire offers less fire but compensates with a saturated hue and enduring corundum hardness that maintains polished facets and reflective performance over time. For discerning buyers who prioritize precise cutting, intense color, and efficient light return in a classic round mixed brilliant format, this Ceylon 0.45 carat sapphire from The Natural Sapphire Company represents a technically sound choice.