2.60 Ct. Cabochon Alexandrite from Tanzania

This 2.60 carat oval alexandrite from Tanzania presents as a translucent cabochon with dimensions 8.22 x 5.84 x 5.48 mm, exhibiting an intense color intensity and a clarity grade of very slightly included at eye level. The lapidary approach favors a precisely calculated oval dome geometry rather than conventional faceting, with an engineered crown curvature and consistent sagittal symmetry that functionally emulate geometric faceting to optimize internal light trajectories. The cabochon profile is executed to strict tolerances, the dome radius balanced against pavilion thickness to concentrate chromatic dispersion and to promote selective internal reflection between the greenish and reddish color states. The girdle perimeter is uniformly finished and the oval outline is true, ensuring predictable light entry and exit angles, while the excellent polish eliminates surface diffusion and preserves sharp, saturated color transitions.

Optically the stone demonstrates strong color change behavior, the greenish to reddish shift activated by directed illumination and accentuated by the stone geometry. Micro inclusions present at very slight levels act as controlled scattering centers, enhancing perceptible color separation without degrading transparency, and the polished dome amplifies pleochroic contrast by channeling light along preferential optical axes. No enhancements have been applied, so the observed color dynamics and clarity are intrinsic to the material and its Tanzanian origin. From a setting and design perspective, the proportionally deep profile and stable oval geometry make the piece ideal for bezel or low prong settings where the dome can be oriented to maximize color change in typical viewing conditions. The Natural Gemstone Company presents this alexandrite as an example of precision cabochon craftsmanship, where geometric shaping, meticulous polish, and respect for the stone inherent properties combine to deliver maximum light play, vivid color change, and a gemstone that responds predictably to lighting environments favored by collectors and connoisseurs.