5.64 Ct. Greenish Yellow Zircon from Ceylon (Sri Lanka)

This transparent oval greenish yellow zircon weighs 5.64 carats, and measures 12.14 by 8.93 by 6.67 mm, and presents an elegant mixed brilliant faceting strategy executed to precise proportions. The cutter selected an oval outline with a length to width ratio of approximately 1.36, optimizing face up spread while maintaining sufficient pavilion depth to enhance light return. The mixed brilliant cut combines a brilliant facet arrangement on the crown with a modified pavilion that moderates windowing and enhances color saturation, and the result is a controlled balance between scintillation and broad flashes of light. Facet junctions are crisp and the symmetry across the major and minor axes is carefully maintained, which when paired with an excellent polish produces clean facet reflections and a pleasing visual texture across the table and crown.

Optically this specimen exhibits intense color intensity with a greenish yellow hue that reads consistently across viewing angles, and the transparency is high with a clarity grade of slightly included as evaluated at eye level. The internal features are minor and localized, and they do not materially diminish the gemological performance, rather they serve as diagnostic growth markers that confirm natural origin. The mixed brilliant faceting accentuates dispersion and the gem shows lively fire and strong contrast between bright and dark facets, while the pavilion design channels light back through the table to preserve the saturated tone. The stone displays the characteristic adamantine lustre associated with zircon, and when mounted the crown facets deliver crisp scintillation under point light sources. The excellent polish maximizes surface brilliance and allows the viewer to appreciate the stone without interference from polishing haze or polish lines.

Geologically this zircon was born deep within the ancient metamorphic and pegmatitic terrains of Ceylon, Sri Lanka, where high temperature crystallization and later tectonothermal events shaped its internal character millions of years ago. Crystallization occurred as silica rich melts and hydrothermal fluids cooled and exsolved zircon crystals, and trace element substitution and localized radiation damage over geologic time contributed to the greenish yellow coloration that this particular gem displays. Zoning patterns and growth structures developed during successive episodes of growth and partial annealing, preserving a record of changing conditions in the host rock, and the durable crystal endured transport and erosion before being concentrated in alluvial deposits where skilled lapidaries recovered and fashioned it. This provenance-based narrative explains the combination of clarity, color, and structural integrity found in this parcel, and underscores why natural Sri Lankan zircons remain prized by connoisseurs who value geological history as much as optical performance.

At The Natural Gemstone Company we certify that this piece is unenhanced, no enhancement, retaining its natural color and natural state, and provenance is Ceylon, Sri Lanka. For practical considerations this zircon, while visually robust, benefits from protective mounting because its hardness and cleavage properties make it more vulnerable to impact than harder gems, and we recommend bezel or protective prong settings for rings intended for frequent wear. Avoid high heat and aggressive cleaning methods that could alter color or induce stress, and clean with warm soapy water and a soft brush to preserve the excellent polish and facet crispness. This 5.64 carat, 12.14 by 8.93 by 6.67 mm, mixed brilliant oval is a collector grade specimen for those who seek natural color and geological authenticity, and it represents a finely executed balance of lapidary precision and the deep time processes that created it, available through The Natural Gemstone Company.