0.42 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent round blue sapphire weighs 0.42 carat, and it is presented in a classic round shape with precise dimensions of 4.41 by 4.50 by 2.91 millimeters. The cutting style is faceted, executed as a mixed brilliant cut that combines a brilliant pavilion with a modified crown design, producing a balanced return of light and scintillation. The stone was evaluated as eye clean at normal viewing distance, with an intense color intensity and an excellent polish. Importantly the sapphire shows no enhancement, and its origin is Ceylon Sri Lanka, a deposit renowned for producing sapphires with lively blue hues and desirable optical character. This combination of size clarity and natural intense color already positions the stone as a specialist selection within the broader sapphire market, while the compact dimensions make it ideal for fine detailed work and delicate bespoke settings.

From a lapidary perspective the mixed brilliant execution in this piece is technically notable. The cutter retained a relatively deep overall depth, approximately sixty five percent of the average diameter based on the stated dimensions, which favors strong saturation and depth without sacrificing return of white light. The pavilion facets are arranged to promote internal reflection and to minimize leakage through the table, while the crown has been shaped to create crisp star facets that break larger areas of color into lively flashes of blue. Facet junctions are clean and well aligned, contributing to the excellent polish grade by allowing light to bounce predictably from facet to facet. The precision in facet angles and the attention to symmetry produce a round that reads larger than its carat weight might suggest when set in ring or pendant because the mixed cut optimizes perceived size through efficient light performance and concentrated color delivery.

Color is the defining characteristic of this sapphire, and its intense classification speaks to both saturation and tone. The hue sits within the pure blue range typical of high quality Ceylon stones, showing strong saturation without an overt shift toward violet or green, and the distribution of color is even across the crown and pavilion. Because the gem is untreated its color derives from natural trace elements and crystal structure, making it materially rarer than heat treated equivalents at this weight and clarity. In the marketplace many stones of similar carat weight are either paler in tone or have been treated to enhance blue saturation, therefore an eye clean, intense blue, unenhanced Ceylon sapphire at 0.42 carat is uncommon. For connoisseurs and jewelry designers who prioritize natural provenance and optical purity, this sapphire represents a scarce opportunity to work with a small stone that retains the visual impact and historical appeal of untreated Ceylon material.

In practical terms the sapphire is well suited to a variety of settings that emphasize its color and cut, and it pairs especially well with minimal bezel or low prong mounts that allow light to enter from multiple angles. The combination of eye clean clarity and excellent polish makes it appropriate for use as a center stone in a delicate solitaire ring or as the focal point in a halo or trilogy composition where a single intense color can anchor the design. From a sourcing perspective The Natural Sapphire Company provides full disclosure on origin and enhancement status, and we stand behind the lapidary quality and selection standards applied to this gem. For buyers seeking a naturally intense blue sapphire in a compact size the rarity of this example distinguishes it from typical market offerings, and our team can assist with mounting options, matching stones for paired pieces, and technical specifications for custom fabrication.