1.81 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 1.81 carat round blue sapphire is a prime example of what educated buyers seek when assessing a single gemstone for both beauty and value. The gem measures 7.10 by 7.07 by 4.78 mm, and it has been faceted into a mixed brilliant cut that balances intense light return with a pleasing visual depth. Originating from Ceylon Sri Lanka, this sapphire exhibits vivid color intensity and an excellent polish, factors that immediately communicate quality to connoisseurs and jewelers alike. The clarity grade is slightly included when evaluated at eye level, which means the stone maintains excellent transparency while showing minor internal characteristics that do not dominate the visual experience. This combination of weight, vivid saturation, and provenance positions the stone as an attractive acquisition for those who value documented origin and classical gemstone attributes, and it is presented by The Natural Sapphire Company with full disclosure that the sapphire has undergone standard heat treatment, a stable and widely accepted enhancement in the trade used to optimize tone and saturation.

The cutting geometry of this round mixed brilliant sapphire is central to its optical performance, and the faceting arrangement was executed to maximize light play across both crown and pavilion. The mixed brilliant cut typically employs a brilliant style on the crown to create lively scintillation and a series of pavilion facets that may combine brilliant and step geometry to enhance depth and color concentration. In this example the table and crown facets break incoming light into flashes of vivid royal blue and electric cobalt, while the lower facet arrangement returns that light as broad flashes and lively pinpoint scintillation. The measured depth of 4.78 mm relative to the average diameter of 7.085 mm yields an overall depth proportion of approximately 67.5 percent, a proportion that contributes to the stone carrying its color with intensity while maintaining strong light return. The excellent polish and careful facet junctions ensure that light is reflected and refracted with minimal surface diffusion, so the viewer perceives both even color saturation and dynamic movement when the gem is rotated under direct or mixed lighting. For buyers who assess cut by how a stone behaves in real settings, this sapphire shows a controlled balance between brilliance and depth of hue, an outcome of disciplined lapidary technique.

When evaluating the slightly included clarity grade, it is important to understand what this means for a practical and investment perspective. Slightly included at eye level indicates the presence of small natural inclusions that are typically visible upon close inspection, yet they do not materially reduce transparency or distract from the overall visual appeal. Such inclusions can be useful as fingerprint like markers that confirm natural origin and can enhance the stone narrative for collectors who prefer identifiable natural characteristics over completely flawless material. The heat treatment reported for this sapphire is the most common and durable enhancement used in corundum, and when performed properly it improves color without introducing unstable fillings or coatings, making the gem suitable for everyday wear in rings and pendants provided basic care is observed. For setting recommendations, a secure bezel or prong design that allows light to reach the pavilion while protecting the girdle will showcase the mixed brilliant faceting and maintain the stone integrity. The Natural Sapphire Company stands behind this gem with clear documentation of its origin and treatment history, and for buyers seeking a classic Ceylon blue with lively optical performance, balanced proportions, and a strong provenance, this 1.81 carat round sapphire represents a compelling and well explained choice.