5.07 Ct. Pinkish Red Spinel from Tanzania

This C.Dunaigre certified, transparent, Brownish Pinkish Orange 5.07 carat cushion shape pinkish red spinel presents a rare combination of size, color intensity, and cutting precision, originating from Tanzania. The table dimensions of 12.85 x 9.78 x 4.79 mm produce a measured depth approximately 42 percent of the average span, which gives the gem a substantial face up presence while maintaining a compact pavilion for controlled light return. The stone is faceted using a mixed brilliant design, with an emphasis on a brilliant style crown blended with stepped pavilion planes, yielding an interplay between wide flash brilliance and structural depth. Clarity has been graded eye clean at standard observation distance, with no internal features interfering with light transmission and no enhancements have been applied, preserving the natural crystal chemistry and optical behavior of this spinel.

The geometric faceting scheme has been engineered to maximize light play, using an optimized ratio between table size and crown height to generate coherent internal reflections and strong contrast patterns. The mixed brilliant configuration takes advantage of a dense crown facet array to break white light into lively pinfire scintillation, while the step facet arrangement on the pavilion refracts and channels light back through the crown as broad, colorful flashes. Facet junctions are sharp and symmetrical, and the polish is excellent, which minimizes surface scattering and preserves the gem s native luster. Spinel is isotropic with a refractive index in the range of approximately 1.712 to 1.718, and this gem s polish quality and facet geometry work in concert to maximize internal light return and perceived saturation, resulting in an intense color intensity that reads as a complex pinkish red with brownish and orange overtones depending on viewing angle and light source.

From a material science and wearability perspective this Tanzanian spinel offers practical advantages paired with refined aesthetics. Spinel s kinetics include stability to common jewelry environments, with a Mohs hardness around 8 and a specific gravity in the neighborhood of 3.58 to 3.61, providing durable resistance to daily wear while retaining an adamantine to vitreous luster when properly finished. The lack of enhancement assures collectors that the color and clarity are intrinsic, and the C.Dunaigre certificate anchors those observations with independent verification. The cushion silhouette was selected to accentuate the stone s hue transition across the table, and the controlled depth preserves face up weight without sacrificing the mixed brilliant facet architecture that produces both lively scintillation and attractive broad flashes.

As representatives of The Natural Gemstone Company we emphasize that this 5.07 carat, cushion shape pinkish red spinel is a technical statement as much as a collector s object. Its balanced proportions, mixed brilliant geometry, and meticulous polish make it an excellent candidate for a prominent ring or pendant setting that will exploit the gem s maximum light play. For buyers who value documented origin, natural state, and exacting cutting technique, this Tanzanian spinel meets those specifications and will perform exceptionally under varied lighting conditions. Please contact The Natural Gemstone Company for additional technical imagery, viewing conditions, and certification details, our team will provide exacting views and measurements to assist with evaluation and setting decisions.