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

One transparent 0.76 carat emerald cut bi color parti sapphire is presented, with precise dimensions of 5.20 x 4.43 x 2.94 mm. The gemstone is faceted in an emerald cut, which emphasizes symmetry and broad, parallel step facets. Clarity is evaluated at eye level as very very slightly included, indicating inclusions are minimal and do not materially affect transparency or overall visual appeal. Color intensity is graded as intense, with a well defined bi color or parti character. The surface finish is an excellent polish, enhancing light return and surface luster. The stone has been heat treated, a commonly applied, stable enhancement in corundum, and originates from Ceylon Sri Lanka. The Natural Sapphire Company reference is included to indicate the source of this grading and presentation.

The emerald cut imparts a measured, architectural aesthetic, with large step facets on the crown and pavilion producing broad color zones and generous light return. Unlike brilliant styles which favor dispersed scintillation, this cut generates parallel flashes and well defined color fields, allowing the parti quality to read clearly across the table and along the step facets. The bi color distribution is stable within the cutting geometry, with transition zones visible along facet junctions. Because the inclusions are very very slight and evaluated at eye level, they do not interrupt the faceting pattern or the primary light paths, and they may be observable only under magnification. Excellent polish minimizes surface diffusion of light, maintaining crisp facet junctions and enhancing the emerald cut signature, a hall of mirrors effect that flatters the intense color without overly fragmenting it.

Under natural daylight, the sapphire displays its richest and most balanced character, with ample blue saturation and secondary hues that articulate the parti nature. In bright direct sunlight, the step facets produce pronounced, linear flashes of concentrated color, creating alternating bands of deeper and lighter blue as the stone is rotated. In open shade or overcast daylight, the overall tone moderates and the lighter component of the bi color quality becomes more apparent, allowing internal zoning and subtle pleochroic tendencies to be observed. Under cool white LED light, the stone maintains its intense saturation, and the emerald cut renders the color in a slightly crisper, more clinical manner, enhancing the contrast between the bi color zones. Warm incandescent lighting and candlelight bring forward warmer undertones, softening the blue and making the lighter zones appear more silvery or pastel, while the deeper zones retain depth and density. Fluorescent lighting can sometimes flatten contrast, reducing the perception of depth, however the step facets preserve linear color structure so the parti attribute remains discernible. When set and viewed in mixed indoor light, the sapphire will exhibit dynamic, angle dependent shifts, owing to both the step cut geometry and corundum pleochroism, presenting a controlled but lively appearance rather than the rapid scintillation of a brilliant cut.

Practical considerations for use and care are straightforward. At 0.76 carat and the stated dimensions, the stone is suitable for a variety of settings where the emerald cut can be showcased, including solitaire, halo, or bezel frameworks that protect the girdle and corners. The rectangular proportions allow the visual weight to read slightly larger on the finger than the carat alone might suggest, due to the elongated table and efficient spread. Heat treatment applied to this sapphire is a standard and stable enhancement, one that does not require special handling beyond normal care for corundum. Routine cleaning with warm soapy water and a soft brush is appropriate, and professional inspection after a period of wear is recommended to confirm settings remain secure. The stone combines the controlled reflections of the emerald cut with the colour dynamics of a Ceylon parti sapphire, a combination that balances visual presence with everyday wearability. The Natural Sapphire Company documentation accompanies this description, confirming the stated measurements and the origin attribution.