1.23 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This sapphire is a study in precision, presented as a transparent round shape weighing 1.23 carats, with measured dimensions of 6.62 by 6.59 by 3.77 millimeters. The near perfect round outline reflects exacting preform work and careful symmetry control, and the overall depth of 3.77 millimeters yields a depth to diameter ratio of approximately 57 percent, a proportion that balances light return with face up color saturation. The cutting style is faceted with a mixed brilliant design, combining a brilliant fashioned crown geometry to maximize scintillation, with a pavilion strategy that favors angular facet junctions for controlled light leakage and contrast. The faceting execution is supported by an excellent polish across all facet planes resulting in crisp facet junctions and minimal surface abrasion, which enhances contrast and ensures that each pavilion and crown facet contributes optimally to brilliance and fire. The craftsmanship evident in the girdle treatment and the evenness of the table facet indicate a cutter who prioritized optical performance, making this stone an exemplary specimen for precise jewelry settings where symmetry and table alignment are critical.

Color characterization is technical and measured, described here as medium color intensity within the classic Ceylon blue range. The hue presents a lively primary blue with subtle tertiary violet overtones that are characteristic of Sri Lankan sapphires, and the medium intensity delivers a balance between spirited saturation and wearable brightness. Because this sapphire is not heat treated or otherwise enhanced, the observed tone and saturation are native to the material, offering collectors a naturally occurring color profile that is increasingly scarce in the market. Optical behavior includes subtle pleochroism when rotated under direct lighting, which manifests as slight shifts between a cooler blue and a slightly warmer blue violet, adding dynamic depth to the face up appearance. The clarity grade is recorded as very slightly included at eye level, meaning inclusions are minor and do not materially impede transparency or light transmission when viewed without magnification. These inclusions serve as internal fingerprints that verify natural origin without compromising the gem s visual performance.

From a gemological and practical perspective the mixed brilliant cutting style used here optimizes both sparkle and color delivery. The brilliant crown facets are proportioned to intercept and refract incoming light into a lively pattern of scintillation, while the pavilion facet design preserves color by moderating the angle of light escape, a crucial consideration when working with medium intensity material. The cutter s decisions regarding pavilion depth and facet angles were clearly intended to produce a vivid center and well defined facet pattern rather than to maximize sheer weight, which is an important attribute for buyers seeking enduring visual value. The stone s hardness on the Mohs scale as corundum ensures exceptional durability for everyday wear, and the absence of enhancement further simplifies long term care because thermal or chemical sensitivities linked to certain treatments are not a concern. For mounting, this sapphire is well suited to a classical solitaire with a low to medium profile to protect the girdle and pavilion, or a halo design to visually enlarge the face up area while preserving the gem s inherent color and brilliance.

Investing in this untreated Ceylon sapphire is an investment in both beauty and craftsmanship, and The Natural Sapphire Company stands behind the gem s provenance and technical description. Untreated stones of this quality are rarer in the current marketplace, and provenance from Sri Lanka carries a documented history of producing cornflower and medium tone blues that are prized by connoisseurs. The combination of a carefully executed mixed brilliant cut, very slightly included clarity at eye level, medium color intensity, excellent polish, and the absence of enhancements yields a piece that retains intrinsic and collectible value. Beyond market considerations the stone represents a durable and technically refined choice for bespoke jewelry, where the cutter s intentions remain visible through facet alignment, table proportion, and overall optical performance. The Natural Sapphire Company can provide detailed documentation and guidance on setting styles that protect and showcase the sapphire while preserving its long term value, and we can facilitate independent appraisal and certification to support both aesthetic enjoyment and investment objectives.