4.65 Ct. Greenish Blue Sapphire from Madagascar

This C.Dunaigre certified Blue sapphire is an exceptional specimen offered by The Natural Sapphire Company, presented as a transparent, greenish blue, cushion shaped gem weighing 4.65 carats, with precise dimensions of 10.36 x 7.93 x 5.69 mm. The stone is faceted using a mixed brilliant cut, a choice that combines a brilliant style crown with a modified pavilion to harmonize brilliance, fire, and color saturation. Origin is Madagascar, and the sapphire is natural with no enhancement, a critical attribute for collectors and connoisseurs seeking investment grade material with inherent geological provenance. The gem displays intense color intensity, a clean visual plane at normal viewing distances, and an excellent polish that produces crisp facet junctions and a reflective surface without significant polish lines or abrasion. Certification from C.Dunaigre accompanies the piece, providing independent verification of weight, dimensions, origin, and the absence of enhancement, which supports both aesthetic and market value.

Technically the cushion outline and mixed brilliant architecture have been executed to optimize light performance given the gem proportions, the crown facets distribute scintillation across the table while the pavilion facets are calibrated to return blue and green wavelengths effectively. Using the provided dimensions the depth registers at approximately 62 percent relative to the average girdle diameter, a proportion consistent with stable optical performance in cushion sapphires, allowing strong internal reflection without excessive windowing or extinction. The mixed brilliant pattern yields a balance of small bright flashes and broader flashes of color, producing lively scintillation at movement and strong face up saturation when viewed under both natural daylight and artificial sources. Symmetry and facet alignment are performed to exacting standards, ensuring that facet intersections meet accurately, and the excellent polish maximizes specular reflection and the perceived intensity of the greenish blue hue.

Clarity is graded as very slightly included when evaluated at eye level, indicating that inclusions are present but do not materially compromise transparency or brilliance for a 4.65 carat stone of this natural origin. The inclusions observed under loupe or microscope provide confirmation of natural crystallization and origin, yet at normal viewing distances the stone reads clean and visually transparent. Color characterization emphasizes a greenish blue primary hue with intense saturation, a well balanced tone, and the subtle secondary green influence that Madagascar sapphires are known to exhibit, creating an appealing and complex color profile that can shift slightly with viewing angle due to weak pleochroic tendencies. Because the sapphire is unenhanced, the observed hue and saturation are stable and intrinsic, attributes that collectors prize for long term valuation and authenticity.

For the high end gemstone collection this sapphire is an exemplary addition, suitable as a display piece, a centerpiece for a bespoke engagement ring, or the focal gem in a museum quality pendant, where the mixed brilliant faceting will interact beautifully with precision settings to showcase both color and light return. The cushion silhouette is classic yet contemporary, pairing cleanly with both four prong and low bezel designs, while an open gallery will allow light entry to enhance face up color intensity. As a natural Madagascar sapphire with C.Dunaigre certification and no enhancement, it carries provenance and technical merit that appeal to seasoned buyers who evaluate gems by cut quality, optical performance, and treatment history. The Natural Sapphire Company can provide additional high resolution images, facet maps, and viewing videos upon request to assist in appraisal, design planning, or acquisition decision making, ensuring transparency and confidence for serious collectors.