1.52 Ct. Bi Color / Parti Sapphire from Ceylon (Sri Lanka)

This transparent 1.52 carat round bi color parti sapphire measures 6.72 by 6.67 by 4.10 mm, and is faceted in a mixed brilliant cut that pairs a brilliant style crown with a modified step pavilion to optimize optical return and maintain a balanced table profile. The cutter has preserved a strong crown to pavilion relationship, producing lively facet interaction while avoiding excessive windowing or extinction, and the excellent polish enhances facet crispness and scintillation. Face up the stone exhibits intense color intensity, with clearly defined bi color zoning that shifts between warm yellow and cool blue green tones depending on viewing angle, a behavior consistent with pleochroic response and differential concentrations of trace elements in natural Ceylon material. Clarity is graded eye clean at typical viewing distances, no enhancement has been applied, and the sapphire is documented as originating from Ceylon Sri Lanka, attributes that together underline natural provenance and stable long term color performance.

Although eye clean to the unaided eye, the internal architecture of this sapphire contains micro features that serve as unequivocal identifiers and contribute to its character. Under magnification, growth zoning, minute crystal inclusions, and subtle healed fissures act as a gemological fingerprint, each feature unique in orientation, size, and interaction with the facet geometry. These internal markers influence local refractive behavior, producing micro contrast that accentuates the parti color separation and yields localized flashes of higher saturation when facets channel light through zone boundaries. From a lapidary perspective, the cutter intentionally oriented and positioned the table and pavilion facets to make the best use of that natural zoning, turning what might be perceived as color irregularity into a designed optical effect. At The Natural Sapphire Company we document these inclusion characteristics as part of our detailed descriptions, because they are not flaws to be erased but natural signatures that confirm identity, origin, and the hand of the cutter. This 1.52 carat round parti sapphire is therefore an attractive choice for a collector or set piece that values technical cutting excellence, intense natural color, and the telltale internal features that make each natural sapphire truly one of a kind.