4.14 Ct. Cabochon Tiger's Eye from Ceylon (Sri Lanka)

This specimen is a 4.14 carat round golden brown tiger eye, fashioned as a high domed cabochon, with precise physical dimensions of 9.84 by 9.90 by 5.62 millimeters. The near perfect round outline indicates careful preforming during the cabbing process, and the slight dimensional variance reflects hand controlled shaping rather than automated trimming. The opaque body color presents a warm golden brown palette that transitions to deeper brown tones along the lower banding, and conventional color intensity metrics are not applicable, because the primary valuation feature here is chatoyancy rather than simple hue saturation. The piece originates from Ceylon Sri Lanka, and it is offered in its natural state with no enhancement, exhibiting an excellent polish that brings out both surface luster and crispness of the cat eye band. The overall mass and compact dimensions make this cabochon suitable for a variety of settings, while the substantial dome height relative to diameter produces a strong optical response under directional illumination.

From a technical perspective the cutting geometry is optimized to maximize light play through controlled convexity and precise axis alignment. Tiger eye displays chatoyancy as a result of its microtexture, where silica has pseudomorphed original fibrous amphibole structures, and the parallel alignment of these fibers produces a concentrated luminous band when light is reflected in a narrow plane. The lapidary objective is to orient the cutting plane perpendicular to the fiber axis to create a single, distinct, mobile band. The dome height of 5.62 millimeters on an average diameter near 9.87 millimeters yields a height to diameter ratio that is relatively high, and this proportion enhances the specular reflection and gives the band a sharp edge as the viewing angle changes. Optical constants consistent with quartz matrix material apply here, including a refractive index near 1.54 to 1.55 and a Mohs hardness around 7, which inform both setting techniques and polishing protocols. The banding exhibits strong contrast between honey gold and deep brown laminae, with a well defined transition that indicates minimal diffusion of iron oxide staining, and the polish quality is sufficient to produce satin free surface scattering that does not diffuse the cat eye band.

Craftsmanship details reflect controlled material handling and finishing that knowledgeable buyers will appreciate. Preforming was executed to preserve fiber orientation, with successive abrasion stages progressing through coarse to fine silicon carbide and diamond wheel grits, followed by final polishing on a lap with submicron abrasives to achieve the excellent finish noted. Thermal management during cutting and polishing was critical to prevent microfracturing and to maintain the integrity of the fibrous structure, and the cutter apparently prioritized axis symmetry and apex centering to ensure the chatoyant band runs cleanly across the dome. For setting recommendations, a bezel configuration is technically preferred to protect the pronounced dome and to maintain the optimal viewing plane for the cat eye under normal wear. East west orientation in ring or pendant mounting will display the band as a moving eye, while pairing with warm metals will reinforce the golden brown tones. Provenance from The Natural Gemstone Company is provided, and the combination of documented measurements, natural untreated status, and lapidary execution make this cabochon a technically compelling choice for collectors and designers who seek a precisely measured and optically optimized tiger eye specimen.