5.10 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

The Natural Sapphire Company presents a transparent Other certified Yellow, 5.10 carat radiant shape yellow sapphire, with precise dimensions of 8.96 x 8.54 x 6.57 mm. The gem is crafted in a radiant cut that combines a brilliant facet architecture on the crown with a modified step facet arrangement on the pavilion, and trimmed corners to balance fire and scintillation with strong durability. The facet junctions are executed with excellent polish, producing crisp light return and minimal windowing, while the overall symmetry preserves a uniform face up color distribution. The stone displays vivid color intensity, and the clarity grade is recorded as very slightly included, evaluated at eye level. Enhancement is by standard heat treatment to enhance chroma and tone, and the documented origin is Ceylon Sri Lanka, a source renowned for saturated, warm yellow hues and distinct internal characteristics.

Under magnification the sapphire reveals a suite of diagnostic inclusions that give this piece an unmistakable signature. Fine oriented silk, predominantly rutile needles aligned along growth zones, forms delicate silky clouds that diffuse light and create a soft velvety glow to the vivid yellow, enhancing apparent saturation without sacrificing brilliance. Intersecting needle sets produce subtle directional sheen when the stone is rotated, a hallmark typically associated with Sri Lankan crystallization habits. Scattered within the pavilion are minute negative crystals and isolated reflective platelets, some partially healed, which act as internal mirrors and augment scintillation at oblique angles. There are also narrow healed fissures with fluid films that impart a fingerprint like pattern only visible under magnification, confirming natural formation and subsequent thermal stabilization. These internal features are well distributed and do not distract from the gem’s face up appeal, they contribute to its individuality and are consistent with the documented Ceylon provenance. For collectors and connoisseurs who value provenance and natural character, this radiant yellow sapphire represents a technically refined cut married to geological specificity. The Natural Sapphire Company is pleased to offer this stone as an example of expert cutting and natural signature traits that together define value and desirability.