1.03 Ct. Blue Sapphire from Thailand

This 1.03 carat oval blue sapphire, offered by The Natural Sapphire Company, is specified with precision to satisfy a technically minded buyer. The stone measures 6.53 by 5.64 by 3.64 millimeters, producing a length to width ratio of approximately 1.16, a proportion that yields a compact, well-balanced oval silhouette. The measured depth of 3.64 millimeters corresponds to a depth percentage just under 60 percent relative to the average diameter, a proportion range that keeps the stone visually full while optimizing internal light return. The mixed brilliant cut combines a brilliant-style crown with a modified pavilion architecture, delivering both scintillation and color saturation. The crown faceting pattern provides dynamic light dispersion face-up, while the pavilion geometry has been arranged to enhance color concentration without creating excessive dark areas or extinction. The excellent polish and careful symmetry contribute to crisp facet junctions and uninterrupted reflection, enabling this sapphire to present a lively, controlled performance under direct and diffused lighting conditions.

Color and clarity are central to the gem’s technical appeal, and this example is evaluated as intense in color intensity with a clarity grade of very slightly included, assessed at eye level. Face-up, the stone displays a deep, saturated blue with consistent tone across the table and shoulders, a result of controlled pavilion depth and balanced facet layout that modulates the interaction of absorption and reflection. The very slightly included clarity grade indicates minor internal features that do not materially interrupt transparency or light return to the naked eye, preserving a clean visual field and maintaining the gem’s luminous quality. For connoisseurs who assess pleochroic behavior in corundum species, this sapphire’s cut and proportioning limit undesirable color zoning by distributing light paths more evenly through the crystal, resulting in a harmonious blue that reads consistently from multiple orientations.

From a treatment and origin standpoint, this sapphire has been heat treated, a stable, industry-standard enhancement used to optimize color and improve apparent clarity. Heat treatment in natural sapphires is an established, permanent process when properly performed, and it is widely accepted by gemological laboratories and informed buyers as a legitimate method to reveal the inherent potential of the rough. The documented origin of Thailand provides contextual information about geological provenance, and it corresponds to known regional characteristics, including a tendency toward richly hued deep blues and a geological history conducive to producing material with robust saturation. Taken together, the combination of thoughtful lapidary design, well-chosen proportions, and responsible enhancement results in a stone that is both technically refined and predictably stable for long-term wear.

Owning this sapphire is an investment in both beauty and craftsmanship, a dual value proposition that goes beyond simple market speculation. At slightly over one carat, this stone occupies a sweet spot where rarity and practical wearability intersect, and the mixed brilliant faceting is a conscious craft decision to balance brilliance with color saturation. The Natural Sapphire Company presents this gem as an example of meticulous cutting discipline: the cutter retained sufficient depth to intensify hue while faceting the crown to maximize scintillation and maintain a lively appearance under varying light sources. For a buyer who values durable materials and considered lapidary technique, this sapphire offers demonstrable technical merits that translate into enduring aesthetic performance in a ring, pendant, or bespoke setting. The stone’s provenance, clarity, and finish ensure that it will remain visually compelling and technically incontrovertible as an object of refined jewellery craft.