0.50 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This exceptional transparent 0.50 carat round blue sapphire from The Natural Sapphire Company presents an immediate appeal to buyers who value precise gemological information and natural beauty. The stone measures 4.86 by 4.75 by 2.90 millimeters, providing a compact yet impactful face up appearance for use in a wide range of jewelry settings. Its mixed brilliant cut has been executed to marry the scintillation and fire associated with a brilliant facet arrangement with the depth control that benefits saturated colored stones. The clarity has been graded as very very slightly included when evaluated at eye level, which for practical purposes means the stone is eye clean and free from visible inclusions that might interrupt the visual flow of color. The color intensity is vivid, a highly desirable descriptor in sapphires that signals strong saturation without appearing overly dark, and the polish is excellent, allowing clean facet junctions and crisp reflections. This sapphire has been heat treated, a stable and widely accepted enhancement in corundum, and its documented origin is Ceylon Sri Lanka, a provenance that has long been associated with some of the most sought after blue sapphires on the market.

Understanding how the mixed brilliant cut enhances this sapphire requires a focus on facet geometry and proportions as they relate to light performance. The measured pavilion depth of 2.90 millimeters and the average diameter of approximately 4.81 millimeters produce a depth percentage near 60.4 percent, a balanced proportion that supports both internal light return and color saturation. A mixed brilliant typically features a brilliant crown to maximize return of white light and lively scintillation, while the pavilion facets are often fashioned to manage color concentration and to reduce windowing, a common concern in colored stones where excessive shallow cutting can wash out hue. The combination of a well sized table, carefully angled crown facets, and a pavilion that avoids excessive steepness allows this sapphire to reflect light in a way that accentuates its vivid blue core, creating flashes of brightness that contrast with areas of deep saturated blue. The cutting strategy employed here optimizes the interaction between incident light and the stone body color, so that motion generates dynamic fire and scintillation without sacrificing the even, velvety blue face up that collectors and connoisseurs prize.

Clarity and color work together to determine a sapphire s perceived value, and this stone performs strongly on both counts. Very very slightly included clarity when observed at eye level indicates that inclusions are minimal, typically only visible under magnification, and therefore the visual purity of color remains uninterrupted. For an educated buyer, eye clean material is a significant advantage because it preserves the integrity of light transmission and minimizes distractions that can reduce perceived brilliance. The vivid color intensity is particularly important in sapphires, because the most valuable blue stones achieve a rare balance between hue purity and saturation. Sri Lankan sapphires are often recognized for their lively, cornflower to vivid blues and for producing stones that are transparent with attractive saturation. Heat treatment in this context is a consistent, industry standard process that enhances color uniformity and can reduce the appearance of very fine inclusions, without compromising the natural corundum structure. The excellent polish further contributes to the stone s allure by ensuring that facets mirror light cleanly, enhancing both brilliance and the even distribution of color across the table.

From a practical and investment perspective this 0.50 carat mixed brilliant Ceylon sapphire offers versatility and long term appeal. At one half carat and under five millimeters across it makes an elegant center for delicate engagement rings or a refined accent stone in halo or three stone configurations, and the images provided demonstrate its presence on the finger, showing a lively yet sophisticated visual impact. The hardness of corundum at nine on the Mohs scale makes it an excellent choice for everyday wear when set responsibly, and the stone s eye clean appearance and vivid color add to its desirability for collectors and designers alike. At The Natural Sapphire Company we examine each sapphire with trained gemologists and adhere to strict standards for grading, documentation, and ethical sourcing, so buyers can be confident in provenance and treatment disclosure. For buyers seeking to maximize the optical performance of this sapphire we recommend settings that allow light to enter the pavilion unobstructed and that showcase the table face up, such as semi bezel, four prong, or low profile halo settings, each of which will emphasize the brilliant mixed cut and the stone s vivid blue personality. Please contact The Natural Sapphire Company for additional information on certification options, recommended mounting styles, and matching stones, or to arrange live viewing so you may appreciate how this gem performs in natural and artificial light.