0.41 Ct. Blue Sapphire from Ceylon (Sri Lanka)

A transparent 0.41 carat round blue sapphire, dimensions 4.69 by 4.69 by 2.43 millimeters, expertly faceted in a mixed brilliant style, presents a compact balance between table, crown and pavilion proportions that optimizes light return for its size. The mixed brilliant cut combines a brilliant style crown with a modified pavilion, producing both broad flash and fine scintillation across the surface. Clarity is graded very slightly included at eye level, which means minute internal features are present but do not impede transparency or overall light transmission. Color intensity is vivid, with strong saturation characteristic of Ceylon Sri Lanka material, and the finish is described as excellent polish, delivering crisp facet junctions and mirror like facet faces. This sapphire has been heat treated to enhance tone and saturation, a stable and widely accepted enhancement, and it is supplied by The Natural Sapphire Company with provenance back to Ceylon Sri Lanka, reflecting traditional Sri Lankan color profiles and gemological attributes.

Optical performance varies predictably with lighting conditions, because the mixed brilliant faceting and excellent polish modulate how light is captured and returned. In bright daylight the stone displays an even field of saturated blue, the open table and shallow to moderate pavilion depth allowing for uniform color distribution and strong face up brilliance. Under cool white LED or flash photography the finer facet facets produce crisp pinpoints of white light and increased scintillation, giving a lively contrast between deep blue flashes and bright facet highlights. In warm incandescent light the sapphire leans slightly toward a richer, velvety blue, the absorbed wavelengths reducing the appearance of any marginal violet or gray undertones, which emphasizes body color over sparkle. Under a single directional spotlight the mixed pavilion returns contrast patterning, creating a dynamic play of broad flashes and tight scintillation, and the excellent polish contributes to sharp reflective facets. The very slightly included clarity grade allows clean light passage so that internal reflections remain attractive, inclusions are not visible in typical mounted applications, and the gem retains strong brilliance and color saturation in everyday wear. For settings that emphasize light return, a white metal mounting will increase perceived brilliance, while a warmer metal will complement the vivid Ceylon blue, making this sapphire a technically refined choice for collectors and designers.