0.59 Ct. Bluish Green Cabochon Sapphire from Ceylon (Sri Lanka)

This sapphire is a 0.59 carat oval cabochon, with dimensions of 5.24 x 4.27 x 2.57 mm, presenting a semi translucent body tone and a bluish green hue. The cut is a traditional domed cabochon, chosen to maximize color depth and to present a smooth reflective surface, and the polish on the dome is graded excellent. Clarity is assessed as slightly included at eye level, indicating visible internal features that do not detract from the overall appearance when set, and the color intensity is medium intense, providing a balanced saturation that reads as distinctly bluish green without overbearing darkness. The stone has been heat treated, a common and stable enhancement in sapphires that improves color and clarity, and its reported origin is Ceylon Sri Lanka, a source renowned for producing a wide range of sapphire colors and well formed material.

Visually, the cabochon profile emphasizes the stone's color and internal character, allowing light to interact with the body color rather than creating facet reflections. The semi translucent nature permits light transmission, producing a soft, glowing appearance from within, while the cabochon surface provides a mirror like luster due to the excellent polish. Slight inclusions are present and are consistent with natural corundum from primary and alluvial deposits, they contribute to the gemological fingerprint of the stone and should be expected when evaluating the piece unaided. The medium intense bluish green color displays subtle variation across the surface as viewing angle and lighting change, a behavior typical in Ceylon sapphires where color zoning or mixed hue distribution can create attractive internal color dynamics.

From a gemological and practical perspective, the heat treatment applied to this sapphire is a stable, widely accepted enhancement that improves its visual appeal while maintaining long term durability. Sapphires have a hardness of 9 on the Mohs scale and are well suited for jewelry that is worn regularly, however the cabochon cut and the semi translucent character are best showcased in designs that protect the dome from abrasion and impact. A bezel setting is often recommended for cabochons to secure the stone and protect its rim, while a low profile prong setting can work for a design focused on minimal metal, provided the setting secures the girdle and offers protection. Routine care consists of warm soapy water and a soft brush to remove surface residue, avoiding harsh chemicals and prolonged exposure to extreme heat, and any ultrasonic or steam cleaning should be considered with caution and discussed with a professional based on the specific treatment history.

The dimensions and weight of this sapphire make it well suited as the center of a refined ring for a delicate finger size, as a pendant in a classic mount where the light can illuminate the dome, or as a matched element in a bespoke pair of earrings where the cabochon shape can be echoed in the metal work. For design integration, the 5.24 x 4.27 mm oval is compact but visible, and mounting with a slightly raised bezel or an open back in a pendant can enhance the translucency and allow light to transmit through the gem. Documentation of origin and treatment is available through standard gemological reporting practices, and The Natural Sapphire Company can provide additional information and guidance for setting, appraisal, and long term care to ensure the sapphire is both protected and presented to best effect.