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

This sapphire presents as a transparent, round, bi color, parti stone weighing 1.57 carats, sourced from Ceylon, Sri Lanka, and offered through The Natural Sapphire Company. The gem measures 6.92 by 6.75 by 4.64 millimeters, and it is faceted with a mixed brilliant cut. The clarity grade is very very slightly included, evaluated at eye level, and the color intensity is classified as medium. The surface condition is described as excellent polish, and the stone has undergone heat treatment as an accepted enhancement to stabilize and refine the color. These objective specifications frame the sapphire as a precisely described, natural material whose visual character is informed by cut, clarity, and origin rather than by subjective impressions.

The mixed brilliant cut and the specific faceting arrangement are central to the stone behavior under light, and they contribute directly to the sense of flawless quality when the gem is rotated or viewed from different angles. The mixed brilliant design combines carefully proportioned crown facets with a pavilion structure that encourages balanced light return, producing consistent brilliance and scintillation across the table and girdle. Facet junctions are even and symmetrical, and the excellent polish on all facets minimizes surface diffraction, allowing the internal reflections to remain uninterrupted. This disciplined execution of cut and finish means that the sapphire displays an even, lively sparkle, with flashes of brightness that are coherent rather than scattered, and the result is a stone that reads as clean and refined in every orientation.

The clarity grade of very very slightly included, evaluated at eye level, indicates that any natural inclusions are minimal and do not detract from the stone appearance when set. These minor internal features are positioned and scaled such that they do not interfere with light transmission, preserving saturation and brilliance. The medium color intensity provides a balance between depth and life, supporting the parti color character that distinguishes this specimen. The bi color, parti presentation is evident as a controlled shift in hue across different facets and angles, a phenomenon enhanced by the mixed brilliant faceting that refracts and redistributes color. Heat treatment has been applied to enhance color uniformity and stability, a standard and transparent enhancement practice for sapphires from Ceylon, and it serves to refine the visual harmony without masking the stone natural origin or structural integrity.

In practical terms the dimensions and 1.57 carat weight make this round sapphire versatile for a variety of jewelry settings, where its polished surface and balanced face up proportions will deliver consistent optical performance. The combination of mixed brilliant cut, very very slightly included clarity, excellent polish, and medium color intensity results in a gem whose perceived flawlessness is a function of deliberate lapidary technique and careful material selection. The origin designation of Ceylon, Sri Lanka, provides additional context regarding the geological character and typical color range of the stone. The presentation here emphasizes measurable attributes and the structural reasons why the sapphire appears exceptionally attractive from every angle, and The Natural Sapphire Company records these specifications to support informed selection and thoughtful setting decisions.