1.59 Ct. Cabochon Chrysoberyl from Ceylon (Sri Lanka)

This piece is a 1.59 carat oval chrysoberyl cabochon with dimensions 6.81 x 6.01 x 4.14 mm, presented as a translucent, yellowish green gemstone classified by laboratory report as Yellowish Green, certified by Other, originating from Ceylon Sri Lanka. The cutting style is a traditional high dome cabochon oval, executed to preserve maximum color depth and internal light transmission, while maintaining a balanced profile for mounting. The clarity grade is very very slightly included evaluated at eye level, indicating minimal internal features that do not detract from the viewers perception under standard viewing conditions. Color intensity is evaluated as intense, with even saturation across the dome and subtle tonal modulation from the crown towards the pavilion area, and the surface finish is described as excellent polish, yielding crisp mirror reflections and strong light return. The gem is untreated, no enhancement, retaining its natural state and crystalline integrity. The Natural Gemstone Company presents this stone with full disclosure of laboratory origin and color classification.

From a gemological perspective this chrysoberyl demonstrates the combination of optical and physical properties that make high quality cabochons desirable for both collectors and connoisseur jewelers. Chrysoberyl typically exhibits a refractive index in the range 1.746 to 1.755, a specific gravity approximately 3.73 to 3.78, and a Mohs hardness near 8.5, providing superior wearability for daily jewelry. The cutter oriented the growth axis to maximize the translucency and to align fine oriented inclusions parallel to the dome, which produces a narrow luminous band under directional lighting, a feature that can be accentuated into a chatoyant effect when set with the band perpendicular to the expected light source. Birefringence in chrysoberyl is low, roughly 0.008, which reduces double image but requires precise lapidary control to avoid off axis strain patterns. The excellent polish observed on this cabochon indicates meticulous final lap work and progressive abrasive sequences, resulting in a smooth interface between stone and metal in bezel or prong settings. The evenness of the color and the depth conveyed through the dome point to a high quality preform selection and careful removal of surface and sub surface irregularities during the cutting process.

Practical considerations for setting, assessment, and long term care are informed by the stone chemistry and optical behavior. Mounting in a low profile bezel will protect the girdle and maintain the orientation that showcases the band and the overall yellowish green tone, while a high crown setting can be used in pendants to expose the dome for optimal top light viewing. Under diffused daylight or soft incandescent lighting the intense yellowish green will appear most true to the lab classification, whereas direct spot lighting will accentuate the luminous band and any silk like inclusions. As this chrysoberyl is natural and unenhanced, its value proposition benefits from transparent provenance to Ceylon Sri Lanka and certification by Other, which supports both appraisal and resale documentation. Routine cleaning with warm soapy water and a soft brush is recommended, avoiding prolonged exposure to acids or extreme thermal shock, and ultrasonic cleaning is generally acceptable given the hard nature of chrysoberyl but should be used with caution if the stone exhibits needle like inclusions aligned near the surface. For collectors seeking a focal cabochon with substantial wearability and a unique yellowish green hue, this 1.59 carat oval from The Natural Gemstone Company combines robust physical properties with refined lapidary execution, and our specialists are available to provide additional imagery, mounting recommendations, or certification copies upon request.