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

This specimen is a 4.64 carat round golden brown tiger's eye cabochon, measuring 9.90 by 9.93 by 6.13 millimeters, with a classic high dome profile and an excellent polish. The cut is a traditional domed cabochon chosen to optimize the stone's chatoyancy, with the dome height calibrated to produce a single, crisp eye that sweeps across the surface as the piece is tilted under directional light. Clarity is graded opaque at eye level, which is typical for quality tiger's eye, and the stone is offered with no enhancement. The material is sourced from Ceylon, Sri Lanka, a locality known for producing tiger's eye with rich, warm golden browns and a fine silky luster. The Natural Gemstone Company presents this piece as a precision cut cabochon where proportions, symmetry, and surface finish are all treated as technical variables to maximize optical performance.

The unique inclusions that define this tiger's eye are structural and mineralogical in origin, arising from the pseudomorphic replacement of crocidolite amphibole fibers by microcrystalline silica, while preserving the original fibrous habit. This specimen exhibits densely packed, parallel fibrous inclusions that act as submicroscopic linear reflectors, producing the characteristic chatoyant band or silk. The band is generated by coherent reflection from aligned lamellar or fibrous remnants, enhanced by iron oxide staining that yields the golden brown color palette. Within the body, one can observe alternating zones of higher and lower reflectivity, manifested as discrete golden stripes against a darker brown ground, and occasional narrow, darker veins that record residual amphibole or concentrations of iron oxide. Fine feathered terminations and subtle cross lamination produce a slightly undulating silk, which is responsible for the stone's dynamic shimmer. These internal features are visible at the surface due to the opaque nature of the material, and they are oriented to create a predictable single eye across the cabochon when set with the band oriented perpendicular to the axis of rotation. The inclusion fabric in this stone reads as a clear provenance signature, consistent with well developed Sri Lankan tiger's eye, where replacement textures tend to be tight and uniformly aligned.

From a craft and setting perspective this round cabochon offers predictable optical behavior and reliable mechanical stability. The 6.13 millimeter dome provides sufficient curvature to produce a concentrated chatoyant band without excessive projection that could compromise bezel seating, making the stone well suited to both bezel and low prong mounts. The excellent polish reduces microscopic surface scattering, sharpening the eye and improving contrast between the golden band and the darker ground. As a silica based material closely related to quartz, the stone exhibits a refractive index from approximately 1.544 to 1.553 and a specific gravity in the range of 2.64 to 2.71, values that inform lapidary handling and setting techniques. No stabilization or dyeing has been applied, so the material will respond to standard care for silica minerals, avoiding prolonged exposure to strong acids or abrasive cleaning methods. The Natural Gemstone Company supplies this cabochon with provenance documentation and technical notes on orientation and recommended mounting to preserve and showcase the inclusion driven signature that makes this tiger's eye unmistakable.