This exceptional 5.39-carat cobalt-bearing spinel represents a rare convergence of color intensity, optical phenomenon, and disciplined cutting. In daylight, the gemstone displays a vivid cobalt blue, saturated yet remarkably clean. Under incandescent or warmer light sources, the color shifts toward violet and purplish tones, revealing a pronounced and visually engaging color-change effect.
The emerald cut has been carefully chosen to frame this phenomenon with clarity and restraint. Step facets emphasize transparency and internal purity, allowing the color transition to unfold gradually across the stone rather than appearing abrupt. With VVS clarity, the spinel presents a clean, open face-up appearance, free from visible inclusions and marked by exceptional internal coherence.
Cobalt spinels are among the most sought-after varieties of spinel, particularly when they exhibit both strong saturation and color-change behavior. Tanzanian material is especially prized for this combination. Stones exceeding five carats with these characteristics are exceedingly rare and command attention among advanced collectors.
Curated by Luxora Minerals for our Cabinet of Curiosities collection, this spinel was selected for its rarity, optical complexity, and refined execution. It stands as a gemstone of both scientific interest and aesthetic authority, suited to high jewelry or distinguished private collections.
*Each gemstone offered by Luxora Minerals is accompanied by appropriate documentation, including existing laboratory reports or detailed product documentation. Additional certification from a recognized laboratory can be arranged upon request when relevant.
