0.92 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This gem is a transparent 0.92 carat round yellow sapphire, with precise dimensions of 5.94 by 5.94 by 3.46 millimeters, presenting a balanced profile that reads as compact and lively in hand. It is fashioned in a mixed brilliant cut, a deliberate choice of faceting that pairs a brilliant style crown with a tailored pavilion architecture to maximize return of light and internal scintillation. The clarity is graded as very slightly included when evaluated at eye level, indicating only minor natural inclusions that do not detract from its overall transparency or performance under normal viewing conditions. The color reads as a medium intense yellow, a saturation level that is vivid enough to register strong presence, while retaining the clean, sunny tonal quality that collectors prize. The surface finish is described as excellent polish, with crisp facet junctions and smooth facet planes that enhance brilliance and allow the sapphire to present sharp flashes of light. The gem has undergone beryllium diffusion, a recognized enhancement technique applied to modify and stabilize the yellow tone, and its origin is Ceylon, Sri Lanka, a provenance that is associated with high quality sapphire material and a historical tradition of expert cutting.

From a cutting and optical engineering perspective, the mixed brilliant faceting on this round stone has been executed to emphasize both fire and brightness, creating a dynamic interplay between broad white light return and smaller colorful flashes. The crown facets, arranged in a traditional brilliant star and kite pattern, open the table to welcome light, while the pavilion facet geometry is tuned to reflect that light back through the crown, producing a balanced distribution of scintillation across the face of the gem. The 3.46 millimeter depth is sufficient to maintain optical depth without creating unnecessary darkness at the center, and the nearly equal girdle diameter across the stone supports even light performance in a variety of mounting styles. The very slightly included clarity grade means that the internal features are generally small and sparse, contributing to a clean window through which the medium intense yellow color can radiate. Excellent polish minimizes light leakage at the facet surfaces, preserving both brilliance and luster, and ensuring that the facet junctions act as crisp mirrors to deliver contrast and sparkle with each movement.

Regarding treatment, beryllium diffusion is a high temperature chemical modification that introduces trace amounts of beryllium into the sapphire lattice to alter chromophore distribution and produce a robust yellow hue. When performed by experienced lapidaries, the diffusion process can achieve uniform saturation while maintaining the stone structure and surface integrity, and the resulting color is stable under ordinary wearing conditions and standard jewelry cleaning. Given the sapphire is corundum, with a hardness rating of 9 on the Mohs scale, it is inherently resistant to scratching and abrasion, which helps preserve the excellent polish over years of normal wear. That said, setting and care should respect the enhancement disclosure, and standard precautions such as avoiding exposure to harsh acids and uncontrolled high heat during later jewelry work will maintain both color and surface condition. The combination of strong cutting, high polish, and stable diffusion enhancement makes this piece particularly well suited for secure prong settings or bezel mounts that showcase the stone face up, while offering protection to the girdle and pavilion.

Over time this sapphire will continue to captivate because its optical fundamentals are engineered for lasting appeal, the medium intense yellow hue retains visual warmth without appearing flat, and the mixed brilliant cut sustains lively dispersion and scintillation with every movement. The durable nature of corundum, paired with the excellent polish and careful proportions of this specific stone, means that its crown and pavilion facets will continue to return light crisply, preserving the visual contrast that gives the gem depth and life. The provenance of Ceylon, Sri Lanka, adds contextual allure, reflecting a geological and cultural lineage that collectors recognize, while the full disclosure of the beryllium diffusion treatment respects ethical standards in trade and care. At The Natural Sapphire Company we select and present stones with an emphasis on both technical merit and enduring beauty, and this 0.92 carat round yellow sapphire embodies the kind of balanced color, precise cutting, and reliable durability that will remain a captivating focal point in jewelry for years to come.