0.44 Ct. Blue Cabochon Sapphire from Thailand

This translucent round shape blue sapphire weighs 0.44 carat, with precise dimensions of 4.20 by 4.30 by 2.49 millimeters, presented in a classic cabochon cut that emphasizes color saturation and surface luster rather than faceted brilliance. The cabochon displays a smooth convex dome, well centered and symmetrical, with an excellent polish that yields a satiny reflection across the table and girdle area. Clarity is graded as included, evaluated at eye level, which in a cabochon contributes to a depth of character and a soft internal glow when illuminated, rather than detracting from the gem. The color intensity is described as intense, a deeply saturated blue that benefits from the cabochon format by presenting a uniform color field and subtle color zoning only visible under direct examination. The craftsmanship shows precise dome curvature and consistent thickness across the piece, ensuring stable wear and predictable light transmission in bezel or closed settings. Heat treated enhancement is disclosed, a common and stable treatment that improves blue saturation and reduces undesirable brown or gray components, while the excellent polish confirms careful post treatment finishing to restore surface integrity and optimize optical performance.

The origin of this sapphire, Thailand, is integral to its identity and market value, as Thai sapphires are historically and commercially significant for both their naturally strong blue hues and the regional expertise in cutting and heat enhancement. Material from Thailand often exhibits particular trace element signatures, commonly iron and titanium, that underpin the vivid blue color, and local cutting houses have a long tradition of producing high quality cabochons and meticulously finished stones. Provenance from Thailand reassures knowledgeable buyers about the likely treatment history and cutting lineage, and it can increase desirability among collectors who value geographic specificity. At The Natural Sapphire Company we document origin and treatment because these factors materially affect long term value and wearability, and because they inform the appropriate setting choice. This 0.44 carat Thai cabochon, with its intense color, included clarity at eye level, heat treatment, and excellent polish, is well suited for elegant bezel mounting or for use as an accent stone where its saturated blue and durable profile will provide enduring visual impact.