6.63 Ct. Yellowish Green Cabochon Chrysoberyl from Tanzania

This translucent chrysoberyl presents as a precisely measured oval cabochon weighing 6.63 carat, with dimensions 10.73 by 8.76 by 7.23 millimeters. The cutting style is classic cabochon, featuring a well centered dome and a symmetrical outline optimized to showcase chatoyancy and color. The bodycolor is a yellowish green of intense saturation, and the stone carries a clarity grade of slightly included when viewed at eye level. Those slight inclusions are internal and distributed in a way that contributes to the optical phenomenon rather than detracting from it. The polish is excellent, producing a glasslike surface that allows the internal band of reflected light to translate to the eye with minimal scatter. No enhancement has been applied to this specimen, and it is offered in its natural state from Tanzania, a source known for producing chrysoberyl material with consistent crystal growth and optical character.

The cat's eye effect displayed by this cabochon is a textbook example of chatoyancy generated by parallel oriented inclusions. In chrysoberyl, these features are typically fine, needlelike or fibrous structures aligned with the crystal symmetry, and when cut to a high dome they form a single sharp band of light that tracks across the surface as the viewing angle or light source changes. In this oval stone the band is visible as a clean, linear flash that bisects the dome near the transverse axis, maintaining definition under direct illumination and softening only slightly in diffused light. The sharpness and uniformity of the band indicate a high degree of parallelism among the inclusions, and the contrast between the bright band and the deeper yellowish green bodycolor creates strong visual separation that enhances the perceived depth and three dimensionality of the cabochon.

From a craftsmanship and practical perspective, several technical attributes ensure this chrysoberyl will perform beautifully in wearable jewelry. The cabochon dome has been proportioned to balance optical performance with structural soundness, preserving the stone's resistance to impact while maximizing chatoyancy. Chrysoberyl is a robust gem species with a Mohs hardness of approximately 8.5, low birefringence around 0.008, and a refractive index in the range of 1.746 to 1.755, characteristics that together yield excellent surface retention and polish longevity. Because the cabochon displays its effect most strongly when the band is oriented perpendicular to the mounting axis, a bezel setting is recommended to protect the high dome and to maintain the correct orientation in daily wear. Prongs can be used provided the setting guards the dome edge and allows the band to remain visible across the central field.

The enduring appeal of this Tanzanian chrysoberyl lies in the combination of natural optical mechanics and superior lapidary execution, qualities that guarantee ongoing fascination over years of ownership. The intense yellowish green color will remain stable under normal environmental conditions, and the unenhanced nature of the stone ensures that what you see is inherent in the crystal, not the result of treatments that can fade or alter with time. As light interacts with the parallel inclusions the ephemeral band will continue to migrate and recompose itself with movement, creating moments of renewed interest with every change in angle or lighting. At The Natural Gemstone Company we value specimens that exhibit both scientific integrity and aesthetic presence, and this cabochon chrysoberyl embodies that duality. Properly set and cared for, it will be a technical specimen and a wearable heirloom that continues to captivate through its durable surface, persistent chatoyant band, and unmistakable natural color.