1.24 Ct. White Zircon from Ceylon (Sri Lanka)

This transparent white zircon weighs 1.24 carats and is fashioned into a round shape with precise dimensions of 5.96 x 6.02 x 3.96 mm, producing an average diameter of 5.99 mm and a measured depth percentage of 66.1 percent. The cutting style is faceted, executed as a mixed brilliant cut, which combines the light return characteristics of brilliant faceting on the crown with the controlled dispersive behavior of step faceting on the pavilion. The cutter has prioritized geometric regularity, maintaining well aligned facet junctions and consistent facet proportions across the table, crown and pavilion planes. The mixed brilliant approach used here intentionally balances facet count and orientation to exploit zircon s intrinsic optical properties, enabling both high intensity white light return and pronounced spectral dispersion. The gem exhibits an excellent polish, with surfaces free of polish lines and abrasions, ensuring that facet planes act as efficient mirrors for internal light movement.

From an optical engineering perspective this zircon demonstrates how geometric faceting can maximize light play in a high refractive index gem. The mixed brilliant design produces a complex interplay between total internal reflection and controlled light leakage, with precisely angled crown facets capturing incident light and channeling it toward the pavilion steps, where repeated internal reflections increase path length and separate colors through dispersion. Despite the inherent birefringence and anisotropy of zircon, the cutter has oriented the pavilion and girdle geometry to reduce anisotropic doubling in face up view while preserving fire. The combination of a moderately deep profile and a carefully sized table enables broad facet windows for brilliance across the table, while smaller upper and lower girdle facets break up light into scintillating pulses on movement. The result is a stone that, under directional lighting, shows rapid scintillation and a lively mixture of bright white return and vivid spectral flashes, making the geometric faceting effective for maximum perceived light performance.

Regarding clarity color and treatment this specimen is graded very slightly included at eye level, indicating minimal inclusions that do not materially affect transparency or light transmission. In practice the inclusions are confined and unobtrusive, allowing the faceting geometry to perform optimally without significant optical interruption. The color intensity is colorless, consistent with high quality white zircon material from Ceylon Sri Lanka, and the excellent polish further enhances apparent color purity by minimizing surface diffusion of light. The stone has undergone heat treatment to improve color uniformity and remove subordinate tint, a stable enhancement routinely applied to Sri Lankan zircons to produce a clean colorless appearance. The heat treatment has been applied and controlled to preserve crystal integrity and to maintain structural features that contribute to brilliance and fire.

As a product offered by The Natural Gemstone Company this zircon reflects our emphasis on technical cutting standards and transparent gemological disclosure. Each facet junction and angle has been evaluated to ensure symmetry and optical balance, and the stone was inspected post treatment to confirm that polish clarity and durability meet our quality parameters. For connoisseurs seeking a precision cut round zircon with engineered geometric faceting designed to maximize light play this 1.24 carat mixed brilliant specimen offers a compelling combination of size provenance and performance. The documentation includes measured dimensions clarity grade color intensity treatment notation and country of origin, enabling confident assessment by jewelers gemologists and knowledgeable buyers who value detailed technical specification alongside exceptional optical behavior.