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

This cushion shaped bi color sapphire weighs 3.69 carats, a weight that places it comfortably in the premium size range for gem quality sapphires and contributes significantly to its presence and market value. The stone measures 9.91 by 8.04 by 5.24 millimeters, yielding a depth of approximately 58.4 percent, a proportion that supports balanced light performance and visual depth without excessive pavilion or crown tradeoffs. The cutting style is a mixed brilliant cut, combining the scintillation of brilliant facets on the crown with carefully proportioned pavilion facetting, a choice that enhances both sparkle and colour dispersion in a well sized gem. The material is transparent, with medium colour intensity expressed as a bi colour distribution, and the polish is graded as excellent, indicating that the facet junctions and surfaces are well finished to maximise light return and optical clarity.

The gemology of this sapphire supports its premium characterization, beginning with the clarity evaluation of very slightly included, assessed at eye level. This clarity assessment communicates that the stone is generally eye clean to most observers, while retaining natural internal features that are typical of untreated corundum before enhancement, and that can serve as identifiers of natural origin when examined under magnification. The medium colour intensity provides a balanced saturation that allows for the bi colour character to be read distinctly across different viewing angles, with subtle shifts between warm golden orange zones and cooler pink to violet tones depending on light and orientation. The mixed brilliant cut further aids in presenting these colours with controlled light return and attractive facet patterning, so that colour zoning appears integrated rather than disruptive. Enhancement by heat treatment has been performed, a standard and stable treatment in the sapphire trade that improves tone and saturation while being widely accepted by the market when fully disclosed.

From a proportion and performance perspective, the 3.69 carat weight combined with the 9.91 by 8.04 millimeter footprint represents a rare convergence of size and fine cutting that commands attention in high quality gem inventory. Stones of this weight that retain transparency, balanced colour, and excellent polish are comparatively less common than smaller goods, and therefore the weight is a primary factor in the stone s premium standing. The origin is Ceylon, Sri Lanka, a region historically recognised for producing sapphires with lively hue and fine crystal quality, characteristics that are evident in this specimen. The combination of Ceylon provenance, heat treatment disclosed according to trade practice, very slightly included clarity, and an excellent finish produces a gemstone that is well suited to investment grade jewellery, where durability, aesthetic performance, and documented origin are important considerations.

For jewellery making and specification, the cushion outline and mixed brilliant faceting make this sapphire suitable for a variety of settings where the stone s table can be displayed to advantage, including solitaire and halo designs where the carat weight and colour play a central role in the overall composition. The depth and pavilion proportions are compatible with secure bezel or prong mounting, and the excellent polish reduces the need for additional lapidary work, preserving the current weight and surface finish. The Natural Sapphire Company documents and discloses the gemological attributes of this sapphire, including carat weight, dimensions, cut, clarity, colour intensity, enhancement, and origin, ensuring transparency for appraisals, custom settings, and provenance records.