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

This 1.24 carat emerald cut bi color sapphire presents a compact but technically well proportioned profile, measuring 6.58 x 5.58 x 3.87 mm. The stone is faceted in a classic emerald cut with truncated corners, a large table facet and concentric step facets on both crown and pavilion that emphasize color planes rather than flash. Calculated depth is 3.87 divided by the mean of length and width, yielding approximately 63.65 percent, a depth that falls squarely within the preferred range for step cuts and optimizes the balance between color saturation and light return. The facet junctions show excellent symmetry, and the cutter has maintained consistent facet angles to produce uniform parallel steps, which is critical in an emerald cut to avoid windowing and to enhance the bi color character. The excellent polish contributes to crisp facet planes and unobstructed transmission of light, permitting the pavilion steps to act as deliberate mirrors that reveal the stone s internal color zoning with minimal surface distortion.

Color and clarity behavior in this piece are the defining technical attributes for discerning buyers. The sapphire displays a dark color intensity overall with distinct parti color expression that shifts between deep blue and warmer purplish red flashes as the stone is rotated and viewed under varied lighting, a result of oriented color zoning and corundum pleochroism. The emerald cut has been oriented to present these color planes effectively, using the long axis to align with the dominant color band and the pavilion step architecture to produce selective color windows. Clarity is graded slightly included at eye level, indicating small natural inclusions that are visible to a trained eye but do not compromise structural integrity. In an emerald cut, such inclusions are often confined within facet intersections or oriented along the steps, where they can be masked by facet reflections, and this piece demonstrates that effect. Heat treatment has been applied, a standard and stable enhancement in sapphire trade, to optimize color uniformity and reduce silk or cloudiness, and documentation of this treatment is provided for full disclosure.

Provenance from Ceylon, now Sri Lanka, substantially informs both the scientific expectations and market valuation of this sapphire. Ceylon is historically and geologically recognized for producing sapphires with lively color distribution and strong pleochroic responses, and it is common for Sri Lankan material to exhibit the parti and bi color phenomena visible here. Origin matters to collectors and connoisseurs because the geological environment of Ceylon imparts characteristic trace element signatures and internal zoning patterns that are reproducible and sought after, and stones from this source carry a premium based on provenance, rarity of particular color expressions, and historical desirability. For practical mounting, the 6.58 by 5.58 by 3.87 mm emerald cut is well suited to four prong, bezel, or step style settings that protect the truncated corners and showcase the parallel facet planes, and the dark intensity will read as richer under natural daylight while the parti color will animate under mixed lighting. At The Natural Sapphire Company we emphasize transparent reporting of origin, enhancement, cut proportions and clarity grading to allow knowledgeable buyers to assess the technical merits of a stone. This sapphire s combination of precise emerald cut craftsmanship, pronounced bi color behavior, stable heat enhancement and Ceylon origin make it a compelling choice for those who value both gemological nuance and the practical considerations of everyday wear.