1.78 Ct. Blue Sapphire from Ceylon (Sri Lanka)

One luminous example of nature and craftsmanship combined, this transparent marquise shape blue sapphire weighs 1.78 carats, with dimensions of 10.55 x 5.08 x 4.26 mm, and originates from Ceylon Sri Lanka. Offered by The Natural Sapphire Company, this stone stands apart from mass market sapphires by virtue of its unheated origin, medium intense blue color, and a clarity grade described as very slightly included when evaluated at eye level. Where many sapphires on the market have been subjected to heat or other enhancements to intensify color and mask inclusions, this Ceylon gem presents its color and character naturally, which enhances both its desirability and long term value. In direct comparison to heavily treated stones, this sapphire carries a premium in authenticity, and compared to stones with lower polish and less precise faceting, it offers a noticeably cleaner and more lively visual experience.

The true technical advantage of this gem lies in its mixed brilliant faceting and carefully considered geometric layout, which allows for maximum light play. The mixed brilliant approach places a series of small, precise facets across the crown and pavilion that were cut to specific angles and proportions to optimize internal reflection, scintillation, and contrast within the marquise outline. This geometric faceting strategy differs from single style cuts, where either brilliance or color dominance is emphasized, by delivering both lively sparkle and even color distribution. Compared to step cuts that emphasize depth of color over sparkle, the mixed brilliant faceting here returns more white light and colored flashes to the eye, producing the sense of movement and life that collectors and connoisseurs prize. The excellent polish further amplifies this effect, as every facet plane catches and throws light cleanly, with minimal surface diffusion that would otherwise mute the visual performance.

Color and clarity harmonize in this piece in a way that many competing sapphires do not. The medium intense blue from Ceylon often exhibits an attractive combination of saturation and brightness, and this example demonstrates that balance well, offering a vivid hue without becoming too dark or too gray. When stacked against deeper, heavily saturated stones that can appear in low light as nearly black, or against paler stones that lack presence, this sapphire occupies a sweet spot that is versatile for jewelry design while remaining true to classic blue sapphire aesthetics. The very slightly included clarity grade means that under normal viewing conditions the eye perceives the stone as essentially clean, and minute natural inclusions are present only to trained observation. These inclusions do not interrupt the gemological performance, and in fact they corroborate the unheated origin, adding to the gemstone story and to its value when compared to otherwise similar looking treated material.

Proportions and shape further enhance the apparent size and suitability of this stone for a range of settings. The marquise cut, with its elongated silhouette and pointed ends, creates the optical effect of increased spread for its carat weight, so the 1.78 carat weight reads larger when worn than many more compact cuts. The length to width ratio reflected by the dimensions 10.55 x 5.08 mm gives an elegant and balanced profile that flatters the finger, and the depth of 4.26 mm contributes to efficient light return while preserving pavilion volume. Compared to round brilliant or cushion shapes where the same carat weight may present a more compact table, this marquise carries presence and a distinct silhouette that makes it ideal for solitaire designs, halo settings, three stone compositions, or unique contemporary mounts. Because the stone is free from enhancement, designers and clients can plan settings with confidence about long term appearance and care, and because the faceting is geometrically optimized, custom work will showcase the gem at its brightest.

In summary, this marquise shape blue sapphire from Ceylon offered by The Natural Sapphire Company represents a superior choice for buyers who value natural origin, careful cutting, and maximum light performance. Its mixed brilliant faceting and excellent polish deliver exceptional scintillation and contrast compared to step cut or poorly proportioned material, and its medium intense Ceylon blue provides a balanced and attractive hue compared to overly treated or overly dark alternatives. The very slightly included clarity at eye level confirms natural character without compromising the visual brilliance, and the unheated state secures rarity and collector appeal in a market where many stones have been altered. For those seeking a refined, elegant, and technically excellent sapphire that will outshine common alternatives, this gem is an outstanding option, and our team at The Natural Sapphire Company is available to assist with viewing, certification, and bespoke mounting to ensure the stone performs beautifully in its finished setting.