1.59 Ct. Greenish Blue Sapphire from Ceylon (Sri Lanka)

This parcel presents one transparent 1.59 carat emerald cut greenish blue sapphire, with precise dimensions of 7.86 by 5.40 by 3.77 millimeters, cut in a classical faceted style. The gem is executed as an emerald cut, employing parallel step facets on the crown and pavilion to emphasize color and directional light performance. The cutting approach favors elongated facet planes and well defined facet junctions, producing broad flashes of tone rather than scintillation driven brilliance. This cutting geometry is ideally suited to the character of a greenish blue sapphire, as it preserves color integrity across the table while delivering controlled reflective surfaces. The Natural Sapphire Company offers this stone as a finely proportioned example of rectangular step cutting, with symmetry and table geometry calibrated to the gem proportions, and with an overall depth that harmonizes face up size with internal light behavior.

Color analysis places this instance in the greenish blue range with a dark color intensity, a combination that yields strong saturation and a noticeably deep hue. The emerald cut concentrates color distribution, so the face up appearance is richly toned, and the dark intensity ensures that hue remains consistent when viewed under variable lighting, while still allowing internal light penetration due to the transparency. The measured depth of 3.77 millimeters produces a depth ratio of approximately 56.8 percent when calculated against the mean of length and width, a proportion that balances color saturation with adequate light return. This balance is particularly important for dark intense sapphires, because an overly shallow pavilion would risk washed out color, and an overly deep pavilion would reduce apparent size and increase windowing. The result is a gem that reads as premium in tone and saturation, while maintaining translucency and surface brightness consistent with high quality faceting.

Clarity is graded as eye clean, evaluated at eye level, which indicates the absence of inclusions visible without magnification, and this contributes materially to the perceived quality and value. Eye clean status in corundum allows the step facets of an emerald cut to display even color planes without distraction from internal features, and it enhances light transmission along the length of the table. The gem has been heat treated, a standard and stable enhancement for Ceylon Sri Lanka sapphires, applied to optimize hue and clarity without compromising structural integrity. The polish is excellent, with crisp facet edges and uniformly smooth planes, evidence of careful lap work and final finishing. These aspects combine to yield tight facet junctions and minimal surface abrasion, factors that improve both optical performance and abrasion resistance during setting and wear. Provenance from Ceylon Sri Lanka adds a well documented color profile and historical connoisseurship that collectors recognize.

In terms of the 1.59 carat weight, this stone occupies a desirable performance range for a rectangular emerald cut sapphire, delivering a significant visual presence while retaining excellent wearable proportions. Carat weight in sapphire correlates with volume rather than linear dimensions, and this 1.59 carat piece represents premium substance within the given measurements, offering a robust face up area due to its balanced length to width ratio. For clients who prioritize a combination of true color, clean clarity, and artisanal cutting, this carat weight produces a gemstone that reads larger on the finger than many round stones of similar mass, because the elongated emerald cut maximizes visible surface area. The Natural Sapphire Company presents this gem as a ready candidate for precision settings that protect the corners and showcase the step faceting, for example a low profile bezel with corner reinforcement or a secure four prong mounting with corner guards. Full disclosure on enhancement and origin accompanies the gem, and we can provide further technical documentation and lapidary notes on request.