25.13 Ct. Blue Star Sapphire from Ceylon (Sri Lanka)

This transparent AGL certified blue star sapphire is presented by The Natural Sapphire Company, weighing 25.13 carats, and cut in an oval shape. The gem measures 16.58 by 13.43 by 12.02 millimeters, and it has a double cabochon cut that preserves a smooth domed surface on both faces. Lab color classification Blue, origin Ceylon, Sri Lanka, and enhancement status no enhancement are documented on the accompanying AGL report. The clarity grade is slightly included when evaluated at eye level, and the polish is excellent, resulting in strong surface luster and clean reflections.

Optical characteristics include vivid color intensity and a discernible star phenomenon when viewed under direct, focused light. The asterism is the result of oriented internal features within the sapphire, and the double cabochon form optimizes the visibility of the star across a range of viewing angles. The body color is a deep, saturated blue, with even color distribution across the oval plane, and small natural inclusions are present, as noted in the clarity assessment. No thermal treatment or other enhancement has been applied, ensuring the gem remains in its natural state as certified by AGL.

For mounting and handling considerations, the 25.13 carat weight and the 12.02 millimeter depth make this sapphire substantial enough for a high quality, secure setting, and the oval outline lends itself to both classic bezel and open back designs, depending on design goals. The double cabochon profile may influence setting height and orientation to best display the asterism, and careful lighting will maximize the star effect. The Natural Sapphire Company includes full certification documentation from AGL with this gem, and the accompanying report verifies origin, color classification, weight, dimensions, cut style, clarity grade, polish, and lack of enhancement. This information supports appraisal, insurance, and design decisions, and it provides a complete factual record for collectors and jewelers.