1.18 Ct. Blue Sapphire from Nigeria

This cushion shape blue sapphire weighs 1.18 carats and measures 6.47 by 5.22 by 3.66 millimeters. The stone is transparent, cut in a mixed brilliant style that marries step facets on the pavilion with brilliant facets on the crown. The clarity is graded slightly included when evaluated at eye level, and the polish is excellent. The color is described as intense, exhibiting a rich, saturated blue that remains lively across multiple viewing angles. There has been no enhancement to the stone, and the sapphire is reported to originate from Nigeria. The combination of natural origin, lack of treatment, and careful finishing yields a gem that presents both technical merit and visual presence, suited to a range of fine jewelry applications.

The mixed brilliant cut and the cushion outline work together to maximize the stone’s optical return while preserving color depth. With its measurements the depth is approximately sixty two point seven percent, a proportion that supports a balanced return of light and a pleasing face up appearance. The brilliant facets on the crown create focused flashes of light and scintillation, while the step elements on the pavilion produce larger planes of color that contribute to the stone’s velvety blue character. Excellent polish ensures that facet junctions are clean and that light transmission is not compromised by surface imperfections. Slight inclusions visible at eye level are consistent with natural corundum from its region of origin, and they do not materially detract from the stone’s overall appeal or structural integrity.

When compared to more commonly encountered gemstones the sapphire’s brilliance behaves differently due to material properties and cutting priorities. Diamond and moissanite exhibit higher refractive index and dispersion, and they therefore display greater fire and bright white brilliance under a wide range of lighting conditions. By contrast corundum, with a lower refractive index, emphasizes color saturation and a depth of tone rather than pronounced spectral fire. Compared to light tone blue stones such as blue topaz or aquamarine this sapphire offers a much stronger color presence and a richer visual weight. Compared to heat treated commercial sapphires the untreated nature of this stone preserves a more authentic, and often more complex, color distribution. Additionally the sapphire’s hardness at nine on the Mohs scale gives it superior resistance to scratches in everyday wear compared to many other colored gems, and its pleochroic tendencies allow the stone to present slightly different blue intensities depending on viewing angle and light source, a quality that contributes to a dynamic but controlled brilliance.

Taken as a whole this 1.18 carat cushion sapphire from Nigeria stands out for three principal reasons, natural, optical, and technical. The absence of treatments means the intense blue hue is inherent to the crystal, a characteristic that collectors and discerning buyers often value for its rarity and transparency of origin. Optically the mixed brilliant cut and the stone proportions produce a combination of lively scintillation and saturated color fields, a balance that many cutters seek when working with richly colored corundum. Technically the gem presents well, with excellent polish and robust hardness, and the slight inclusions are consistent with an untreated natural sapphire rather than signs of enhancement. The Natural Sapphire Company documents the origin and treatment status of the stone, and our gemological evaluation supports the attributes described here, making the sapphire a considered choice for a setting where color integrity and authenticity are priorities. If you require additional measurements, photography, or a full gemological report we can provide those details to assist with evaluation and design decisions.