1.80 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 1.80 carat round blue sapphire from Ceylon offered by The Natural Sapphire Company represents a confluence of classic provenance and meticulous lapidary execution, making it a refined acquisition for the discerning collector. The stone measures 7.41 by 7.33 by 4.31 millimeters, a set of proportions that translates to a well balanced round outline and a depth ratio near 58.5 percent, a dimensional relationship that supports both strong face-up presence and efficient internal light performance. Cut as a mixed brilliant, the pavilion and crown geometry have been engineered to prioritize color saturation and scintillation simultaneously, resulting in a gem that serves equally well as a statement center stone or as the focal point in a high-end suite. The origin, Ceylon Sri Lanka, and the documented enhancement by controlled heat treatment are consistent with market expectations for premium blue sapphires and provide clarity on both geological source and post-mining optimization.

From a faceting and finish perspective the mixed brilliant configuration combines a traditional brilliant crown with a modified pavilion architecture, affording the stone the lively facet play associated with round brilliants while permitting weight retention and enhanced color concentration toward the table. The given dimensions produce a depth percentage that sits within the ideal window for round cuts, allowing for well proportioned crown and pavilion angles that maximize return of blue light and contribute to the vivid face-up color. The cutter has employed a dense facet map, typical of a quality mixed brilliant, which yields crisp facet junctions and a high frequency of small flashes rather than broad windowing. The excellent polish noted in our assessment is apparent on facet surfaces and facet junctions, where luster is uniform and reflections are clean, indicating careful final laps and quality control at the finishing stage.

Color and clarity are two of the defining attributes of this sapphire. The intensity is formally described as vivid, indicating a saturation level that is both highly desirable and visually striking. This vivid blue displays strong chroma without drifting toward overly dark tones, which preserves brilliance and allows the stone to remain visually lively under a range of lighting conditions. The color distribution is even across the table and crown, with no perceptible zoning at face-up viewing distances, which speaks to both the original crystal homogeneity and the thoughtful orientation during cutting. Clarity is graded as eye clean at standard viewing distances, meaning that no inclusions compromise transparency or visual impact when examined at eye level. Eye clean material in conjunction with vivid saturation produces a clean, deeply colored face-up appearance without the need for fracture-filling or other invasive enhancements. Heat treatment is noted in the dossier, a stable and industry-standard enhancement for sapphires from this region, applied to optimize hue and saturation while maintaining the gem’s structural integrity.

For collectors and connoisseurs assessing both aesthetic and technical merit, this sapphire offers versatility in mounting, long-term durability, and provenance that complements a curated collection. The mixed brilliant cut and the stone’s proportions favor settings that allow the table to present unobstructed, such as six-prong heads or low-profile bezels that still permit light ingress to the pavilion. Given the excellent polish and vivid color, open gallery settings that permit light to interact with the pavilion facets will emphasize scintillation and color depth, whereas more protective settings will preserve the stone’s condition for daily wear. The Ceylon origin contributes to the narrative value of the piece, as Sri Lankan sapphires are historically prized for their lively blue hues and are sought after by collectors who value both aesthetic character and geological lineage. The Natural Sapphire Company documents treatment and origin information internally, and we can facilitate independent gemological reports upon request to support provenance, valuation, and insurance needs, ensuring that this sapphire integrates seamlessly into a high-end collection with full disclosure and professional substantiation.

Overall, this 1.80 carat Ceylon blue sapphire is a textbook example of how careful sourcing and expert cutting converge to produce a gem suitable for serious collectors and bespoke jewellery projects. The combination of a precise mixed brilliant facet design, a depth ratio near the ideal range, vivid color intensity, eye-clean clarity at face-up viewing, and an excellent polish all contribute to a stone that stands out in both technical and visual assessments. When evaluated alongside other market specimens, the balance of optical performance and clean, strong color makes it an exemplary choice for anyone seeking to add a piece with both immediate presence and enduring collectibility. For clients requiring further technical data, high resolution facet maps, or independent laboratory certification, The Natural Sapphire Company will provide detailed support to ensure complete confidence in acquisition and integration into a premier gemstone collection.