4.24 Ct. Bluish Green Sapphire from Madagascar

This transparent C.Dunaigre certified Blue Green sapphire weighs 4.24 carats, and measures 10.05 x 7.92 x 6.58 mm in an elegant oval shape, cut in a faceted mixed brilliant style. The mixed brilliant cut combines a brilliant crown with a faceted pavilion, creating a lively balance of brilliance and contrast that enhances the stone sculpturally. The clarity is graded as very slightly included, evaluated at eye level, which means inclusions are minimal and do not materially interrupt the visual purity when set. Color is described as intense bluish green, and the gemstone displays an excellent polish that allows maximum light return. Importantly, this sapphire has no enhancement, a characteristic that significantly increases its rarity and market value compared with the many heat treated examples in the trade. Origin is Madagascar, a source that has produced many high quality sapphires with attractive tertiary hues, and the C.Dunaigre certification provides independent verification of these attributes. For an educated buyer, the combination of untreated status, vivid natural color, solid clarity at eye level, and an excellent finishing polish makes this piece a compelling investment, both for its aesthetic presence and for long term desirability within reputable collections.

When comparing reflective qualities to other gemstones in its category, corundum sapphires sit toward the higher end of hardness and refractive response, which contributes to a strong vitreous luster and enduring surface reflection. With a refractive index higher than beryl family stones such as aquamarine, and marginally higher than spinel, this blue green sapphire returns light with greater intensity, appearing more lively and satiny, especially when skillfully faceted in a mixed brilliant cut. Compared with Ceylon sapphires that often show lighter, airier blue tones, this intense Madagascar example offers denser saturation and deeper visual weight, while Kashmir sapphires are known for a velvety blue that is warmer and more rare. Relative to gems with higher dispersion like diamond, corundum exhibits less fire, but the mixed brilliant cutting style maximizes sparkle and scintillation within corundum parameters, producing crisp flash and attractive contrast. The exceptional polish enhances mirror like reflections on the table and crown facets, and the stone benefits from corundum hardness for everyday wear, outperforming many other colored stones in durability. The Natural Sapphire Company presents this piece as a natural, untreated, and certified option that combines technical merit with collector appeal, suitable for buyers who prioritize verified origin, untreated status, and superior cutting and polish.