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

This listing describes a single transparent 3.05 carat bi color parti sapphire, cut in an emerald cut faceted shape with dimensions 9.33 x 7.21 x 4.37 mm. The stone exhibits intense color intensity and is graded as very very slightly included when evaluated at eye level, reflecting a clarity that presents minimal internal features to unaided vision. The cutting style is faceted, with an emerald cut that provides broad, step-like planes which emphasize the sapphire's internal color zoning and offer a restrained, architectural appearance. The surface finish is noted as excellent polish, resulting in crisp facet junctions and a clean interaction with light. The sapphire is heat treated, a stable and commonly used enhancement in corundum that improves color saturation while preserving the stone's natural character. The reported geographic origin is Ceylon, Sri Lanka, a source historically associated with lively and varied sapphire hues, including parti color examples.

Bi color or parti sapphires are less commonly encountered in larger sizes with this degree of transparency and color intensity, and that scarcity is a central aspect of this stone's character. Parti sapphires are often admired for their distinct zones of two or more colors, however many such specimens are smaller or exhibit more pronounced inclusions that reduce transparency and visual clarity. A 3.05 carat example that retains a transparent body with intense colors is notable, because it requires both a quality rough from which to cut and careful lapidary work to preserve the natural zoning rather than blending it away. In the market, similarly sized sapphires with bi color characteristics are typically either more heavily included, resulting in a less transparent appearance, or they are of a more muted color intensity. This sapphire therefore occupies a narrower portion of the supply curve, where size, transparency, and bold parti coloration coincide.

The emerald cut employed for this stone has been selected to present the color zoning in a controlled and elegant manner, with broad rectangular facets that allow observers to see extensive areas of the color fields at once. In contrast to brilliant cuts which scatter light for maximum sparkle, the emerald cut yields a more subtle, satiny luster and accentuates the linear transition between color zones. The proportions given by the 9.33 x 7.21 x 4.37 mm measurements indicate a well balanced outline for an emerald cut of this carat weight, producing a face up presence that reads larger than many rounded or deeper cuts of similar weight. The excellent polish contributes to surface brightness and ensures that light transmission is not compromised by facet haze. The clarity grade of very very slightly included at eye level means that inclusions are minor and do not materially interfere with the stone's transparency or its ability to show clean, distinct color separation.

Heat treatment is a standard, accepted practice for sapphires that serves to optimize color and clarity in a stable manner, and it has been applied to this gem. The treatment should be considered in context with the stone's provenance and observed qualities, as it enhances the already strong color intensity without masking the natural bi color character. The Ceylon origin is a descriptive attribute that aligns with historical and contemporary production of parti and multicolor sapphires from Sri Lanka, reflecting geological conditions that can produce varied chromatic zoning within individual corundum crystals. The Natural Sapphire Company documents and discloses treatment and origin for its gems, and this sapphire is presented with those transparent attributes for professional assessment. For collectors or designers seeking a rare confluence of size, clarity, and vivid parti coloration in an emerald cut format, this sapphire represents a distinct example within the available spectrum of natural sapphires.