0.86 Ct. Yellow Cabochon Cat’s Eye Chrysoberyl from Ceylon (Sri Lanka)

This 0.86 carat yellow chrysoberyl is a translucent oval cabochon measuring 5.35 by 4.57 by 3.52 mm, sourced from Ceylon, Sri Lanka. The gem displays a medium color intensity, a clarity grade of slightly included as evaluated at eye level, and an excellent polish. The stone has not been subjected to any enhancements, preserving its natural optical character. The oval outline and the carefully controlled height of the dome were selected to balance visual presence with light transmission, yielding a compact, wearable size that still reveals the material’s defining optical behaviors under direct and diffused illumination.

The cabochon cut is the decisive factor that transforms the inherent internal structure of this chrysoberyl into a vivid observable effect. Light entering the rounded dome is refracted and guided by the curved surface, concentrating reflections from aligned, needle like inclusions into a coherent linear highlight. This orientation dependent concentration produces the cat’s eye or chatoyancy phenomenon, observed here as a single, well defined band of light that crosses the face of the stone. The oval format channels that band along the long axis of the gem, producing a steady, elongated stripe rather than a fragmented or diffuse flash. The relative dome height of 3.52 mm gives sufficient curvature to focus the reflected light into a narrow band, while maintaining translucency so the band appears to sit on or within the body of the stone instead of merely on the surface. Under movement or changing light angles the band translates smoothly across the dome, creating a dynamic interplay between the internal light band and the softer wash of the yellow body color, a contrast that enhances perceived depth and vitality.

Clarity inclusions that would reduce desirability in faceted gems perform a functional role in this cabochon, acting as the scattering structures that define the cat’s eye, and their slight visibility at normal viewing distances is consistent with the grade reported. The excellent polish across the dome ensures high surface luster, minimizing surface diffusion and preserving the sharpness and contrast of the light band, while the absence of enhancements guarantees that the optical effect and color are intrinsic to the specimen. For setting considerations the gem’s modest dimensions and stable cabochon profile make it well suited to secure bezel or closed back mounts that protect the dome, and to designs where the single linear highlight can be presented perpendicular to the expected viewing axis, maximizing chatoyancy. The Natural Gemstone Company presents this chrysoberyl as an unaltered example of Ceylon material where the interaction of cut, internal structure, and polish produce a clear, mobile band of light, a result of intentional cutting choices that emphasize the material’s capacity to reflect and concentrate light into a distinctive cat’s eye.