0.56 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent blue sapphire weighs zero point five six carat, and is fashioned into a classic round shape with dimensions of four point four eight by four point five three by three point six zero millimeters, an exacting size that performs exceptionally in both solitaire and three stone settings. The gem is cut to a mixed brilliant geometry, combining a brilliant facet arrangement on the crown with a modified pavilion facet structure to optimize both scintillation and color saturation, and the execution of the faceting exhibits precise symmetry which results in a balanced array of light return across the table. The color is described as medium light intensity, a characteristic Ceylon tone that reads as an even cool blue under diffuse lighting and which reveals an attractive internal glow under direct illumination, the medium light saturation allowing for delicate color dispersion without appearing washed out. Origin identified as Ceylon, Sri Lanka, this sapphire displays the classic island signature of appealing cornflower tones derived from trace elements distributed through the corundum lattice, and the piece has received conventional heat treatment to enhance its chroma and clarity, a stable enhancement that is widely accepted within the trade for this material and which preserves the stone’s inherent transparency and structural integrity.

Clarity is graded as very very slightly included when evaluated at eye level, a notation that indicates inclusions are minor and unobtrusive to unaided visual inspection, inclusions are minute and do not interfere with the optical pathways that create faceted brilliance, and under magnification these features appear as isolated pinpoint crystals or fine silk that do not materially affect transparency. The polish is excellent, evidenced by crisp facet junctions and mirror like facet planes which minimize light leakage and maximize contrast patterning, and the mixed brilliant cut further accentuates scintillation by placing brilliant facets where they most effectively interact with incident light. From a proportion perspective the stone presents a modestly deep pavilion relative to its diameter, the depth to diameter relationship being approximately eighty percent, a configuration that concentrates return through the pavilion and produces a vivid window free presentation from the face up view, while the slightly deeper profile enhances apparent color depth without sacrificing overall brilliance in most mounting styles. These cutting choices, executed with attention to precise facet alignment and polish standards, yield a gem that balances fire, brilliance, and saturation in a manner that will read as lively and lively toned once set.

Durability is a key technical advantage of this corundum specimen, the sapphire possessing a Mohs hardness of nine, which places it immediately below diamond on the Mohs scale where diamond rates ten, and this exceptional hardness confers high resistance to abrasion and scratching in daily wear applications. Because of this hardness, the stone is well suited to be set in engagement rings or everyday jewelry, and standard mounting choices such as prong settings for maximum visibility or bezel settings for enhanced protection are both viable, noting that bezel mounting will offer additional defensive support for the slightly deeper pavilion. Heat treatment, as disclosed, is a stable enhancement that does not compromise the intrinsic hardness or toughness of corundum, and provenance from Sri Lanka adds an important marketplace attribute given the historical desirability of Ceylon blues. Offered by The Natural Sapphire Company, this round mixed brilliant sapphire is a technically refined example of Ceylon material, combining precise cutting, excellent polish, conservative clarity characteristics, and proven durability, making it a compelling option for connoisseurs seeking a naturally derived blue stone that performs reliably for daily wear while retaining classical island color character.