3.83 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This cushion shaped blue sapphire weighs 3.83 carats, and measures 9.30 x 9.12 x 4.61 millimeters, presenting a substantial presence for a center stone, and a balanced table to depth ratio that complements both solitaire and halo settings. The gem is cut in a mixed brilliant style, combining the scintillation of brilliant facets with a more classical step oriented pavilion, which enhances fire and return of light while maintaining color depth. The clarity is graded very very slightly included at eye level, indicating that inclusions are minor and do not distract to the naked eye, supporting excellent transparency and allowing the vivid color to be seen uniformly from the table. The polish is excellent, giving every facet a smooth, mirror like finish that maximizes internal reflection and contributes to the overall brilliance. This sapphire is heat treated, which is a widely accepted and stable enhancement in the trade used to deepen and even out color and to improve clarity, and the stone is from Ceylon, Sri Lanka, a historic source renowned for producing sapphires with lively, saturated blues and a luminous, almost velvety tone, factors that experienced collectors and connoisseurs recognize as desirable. At The Natural Sapphire Company we document origin and treatment history for transparency, and this stone exemplifies the combination of classical provenance and modern lapidary refinement.

Under different lighting conditions this sapphire displays a predictable and elegant range of visual effects, rooted in its color saturation, cut geometry, and clarity. In bright daylight, especially indirect natural daylight, the stone reveals its truest vivid blue, with the medium to strong saturation appearing cool and pure, and facet junctions showing crisp flashes of lighter blue where the mixed brilliant facets return light to the observer. Under direct midday sun the contrast between deep blue areas and brilliant flashes increases, giving a lively appearance without washing out the color, because the depth of the pavilion maintains strong color saturation. Under warm incandescent lighting or candlelight the stone reads slightly warmer, with the blue shifting toward a richer, more velvety tone and with flashes that can appear almost royal blue, due to the increased red component in warm light interacting with the stone matrix. Under modern LED lighting the effect depends on the LED color temperature, but a neutral to cool LED will closely approximate daylight rendering, preserving vividness and sparkle, while a warmer LED will accentuate depth and create a more intense, saturated look. The mixed brilliant cut ensures that in movement the stone scintillates, sending small points of light across the table and crown facets, while the cushion outline and even pavilion depth produce broad flashes of color when viewed face up, making the gem very photogenic and particularly striking when set in an open gallery or low crown mounting.

For the educated buyer this sapphire represents an exceptional balance of important quality factors, combining weight, origin, cut, clarity, and finished polish in a way that supports both aesthetic and long term value considerations. The 3.83 carat weight places this sapphire in a size category where color and purity become more difficult to find simultaneously, and in this piece the vivid Ceylon blue, confirmed origin, and very very slightly included clarity grade together create scarcity that informed buyers appreciate. The mixed brilliant cut is advantageous because it preserves color depth while generating dynamic brilliance, making the stone versatile for a range of jewelry designs from classic three stone rings to bespoke vintage inspired mountings, and the excellent polish means less risk of surface wear hiding under reflected light in everyday wear. Heat treatment, disclosed and standard in the trade, is stable under normal wearing conditions, and it is an accepted enhancement that allows the underlying natural properties of Ceylon sapphires to be expressed more vividly, a practice familiar to gemological professionals and collectors. At The Natural Sapphire Company we focus on verified origin, accurate condition assessment, and full disclosure, so purchasers receive both the technical information needed to make a confident acquisition and the assurance that the stone will perform as expected in different lighting environments and in long term use.