0.57 Ct. Orangish Yellow Sapphire from Ceylon (Sri Lanka)

This elegant gem offered by The Natural Sapphire Company is a transparent oval orangish yellow sapphire weighing 0.57 carat, with dimensions 5.95 x 4.22 x 2.40 mm. The cutting is a mixed brilliant cut, combining a brilliant facet pattern on the crown with a tailored pavilion geometry to optimize light return and face up fire, finished to an excellent polish. The clarity grade is very slightly included evaluated at eye level, meaning minor natural internal features are present but do not detract from the gem presence under normal viewing. Color intensity is medium intense, presenting a warm balance of orange and yellow that reads vibrantly under both daylight and incandescent light. Enhancement noted is heat treated, a stable and internationally accepted process that improves color uniformity and reduces certain types of inclusions, while the origin is Ceylon Sri Lanka, a provenance renowned for producing sapphires with lively tone and exceptional saturation.

From a gemological perspective this sapphire demonstrates precise proportioning for an oval mixed brilliant, the length to width ratio measuring approximately 1.41 which yields a pleasing elongation that maximizes face up color while maintaining symmetry for optimal optical performance. The pavilion and crown have been faceted to complement the refractive properties of corundum, with facet junctions positioned to control light leakage and to reinforce scintillation across the table and shoulders. The excellent polish enhances facet brightness and allows specular reflection to travel cleanly through the stone without surface interference. The very slightly included clarity grade indicates the presence of minute crystals or healed fractures that are consistent with natural formation, these features often become part of the internal fingerprint that confirms natural origin and contributes to the stone story, while remaining largely invisible to the unaided eye when set.

Corundum forms under rigorous geological conditions, and this particular piece began its journey millions of years ago in the high grade metamorphic terrains of Ceylon Sri Lanka. At depth, regional metamorphism and localized contact metamorphism concentrated aluminum rich material, enabling aluminum oxide to crystallize under sustained high temperature and pressure. Trace elements such as iron and occasional chromium or titanium were incorporated into the crystal lattice during growth, producing the orange yellow hue that distinguishes this sapphire, trace element partitioning dictating the precise balance between orange and yellow rather than a simple single tone. Tectonic uplift and weathering liberated corundum crystals from bedrock, with subsequent fluvial transport concentrating gem quality material into river gravels where artisanal and modern mining recovered select pieces over generations. This natural history underpins the gem character, and heat treatment carried out with controlled thermal regimes refined the visible color and reduced fine silk inclusions, respecting the stone integrity while enhancing its appeal for jewelry use.

Our lapidary approach honors the geological origin and optical potential of each rough, translating the natural chemistry and crystal habit into a calibrated finished gem. The mixed brilliant faceting was selected to enhance color saturation within the table while preserving crisp pavilion facets to return light efficiently, a balance that requires precise facet angles and consistent girdle symmetry. The moderate depth proportion yields an even face up tone without undue windowing or a dark keel, and the excellent polish ensures long term wearability and ease of setting in a variety of mounting styles. The Natural Sapphire Company sources responsibly from Ceylon, and each piece receives careful screening for treatment disclosure, stability, and suitability for daily wear. This 0.57 carat oval orangish yellow sapphire is well suited as a center stone for a refined ring or a pendant where medium intense color and subtle brilliance are desired, and our gem specialists are available to advise on mounting geometry and metal selection to optimize color contrast and overall design balance.