1.07 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This parcel consists of a single, transparent round blue sapphire weighing 1.07 carats, with measured dimensions of 6.04 by 5.99 by 3.78 millimeters. The proportioned silhouette yields an overall depth of approximately 62.9 percent, a figure derived from the measured crown and pavilion height relative to the average diameter, which is consistent with mixed cuts designed to prioritize color saturation and face-up presence. The stone is fashioned in a mixed brilliant cut, pairing a brilliant-style crown faceting scheme with a pavilion geometry optimized to return color. Facet junctions display tight symmetry and consistent facet size, and the finish is described as excellent polish, resulting in high surface luster and minimal diffusion of light at facet junctions.

Color performance is a defining attribute of this sapphire, graded as having intense color intensity. The hue reads as a pure blue with a very slight cool secondary component that enhances the perceived depth without producing unwanted inky or brown modifiers. Color distribution across the table and pavilion is uniform, with no observable zoning when viewed face up under standard daylight-balanced illumination. The mixed brilliant cutting style here has been selected to balance two optical priorities, scintillation and color saturation, by using a brilliant-cut crown to create lively flashes and a deeper pavilion geometry to concentrate and return the blue saturation to the viewer’s eye. Optical properties intrinsic to corundum, including a refractive index range near 1.762 to 1.770 and distinct pleochroism in some orientations, contribute to visual richness; the cutting strategy maximizes the favorable interplay of these properties for consistently rich face-up color.

Clarity is reported as very very slightly included, evaluated at eye level, which in practice indicates that inclusions are minute and do not interfere with face-up performance or the gem’s optical path under normal viewing conditions. Under magnification these inclusions are typically pinpoint crystals or healed fissures that do not compromise structural integrity. The sapphire has been heat treated, a stable and widely accepted enhancement for corundum that reduces silk and improves hue and tone by relieving growth-related color centers. This treatment is permanent under normal wear and does not detract from long-term performance provided the gem is handled and set according to standard jewelry care guidelines. The gem’s hardness, at 9 on the Mohs scale, affords excellent resistance to abrasion, while a specific gravity near 3.95 to 4.03 confirms the expected density for natural corundum, factors that support the gem’s suitability for daily-wear rings and other secure settings.

Origin attribution to Ceylon, now Sri Lanka, is significant for both gemmological and historical reasons and informs the character observers will notice in the stone. Sri Lankan sapphires are traditionally celebrated for lively, saturated blues that maintain a degree of clarity and lightness that differentiates them from deeper, more velvety material from other classic sources. Historically, Ceylon sapphires have been incorporated into royal regalia, talismanic jewelry, and the navaratna tradition of South Asia, where the blue sapphire functions as a protective and auspicious stone. That lineage is not merely cultural; it reflects centuries of lapidary knowledge concentrated around Sri Lankan material, where cutters learned to accentuate the distinctive optical properties of local corundum. This particular gem exhibits that lineage in its combination of intense yet lively blue, excellent polish, and a cut that references traditional mixed-cut proportions used to maximize both appearance and wearability.

The Natural Sapphire Company presents this 1.07 carat Ceylon round sapphire as a precision-crafted example suitable for collectors and discerning clients seeking a historically resonant but technically optimized gem. Recommended applications include a solitaire engagement setting that allows a well-proportioned table and crown height to display the color, or a low-profile four- or six-prong mounting that secures the stone while preserving light entry and return. For a jewelry designer seeking maximum color saturation, settings that allow more pavilion visibility, such as partial bezel or open-gallery mounts, will emphasize the depth and intensity reported here. For further technical documentation, The Natural Sapphire Company can provide condition reports and high-resolution imaging, along with provenance information and guidance on mounting options to preserve the stone’s polish and integrity. Our gem specialists can advise on settings that respect the stone’s proportions and treatment status so that the sapphire performs optimally in everyday wear while acknowledging its Ceylon heritage.