12.67 Ct. Yellowish Green Cabochon Cat’s Eye Chrysoberyl from Ceylon (Sri Lanka)

This 12.67 carat round yellowish green chrysoberyl from Ceylon Sri Lanka is presented by The Natural Gemstone Company, offered as a carefully evaluated natural gem that combines optical character and material integrity. The gem measures 11.84 x 10.93 x 9.75 mm, and is fashioned as a cabochon to enhance its chatoyancy. The cutting style is rounded and domed, with proportions chosen to optimize the visibility of the cat s eye, while preserving weight and form. Clarity is graded as very slightly included, evaluated at eye level, which allows the stone to retain transparency where present, and to exhibit the characteristic band of light with clarity and definition. Color intensity is described as dark, with a yellowish green hue that shifts subtly with movement and viewing angle. The surface finish is of excellent polish, and the piece is untreated, with no enhancement declared, ensuring the natural origin and character of the material.

The cat s eye effect, also known as chatoyancy, is the defining visual feature of this chrysoberyl. A distinct band of light runs across the dome of the cabochon, creating a striking, linear highlight that appears to glide across the surface as the stone or light source moves. This optical phenomenon is produced by fine, parallel inclusions within the crystal structure that reflect light in a concentrated line, and the cabochon shape serves to concentrate and present that reflection as a single, clean band. In this specimen the band is notably centered and well marked, providing strong directional definition. Under focused lighting the band displays a bright, almost luminous stripe that contrasts with the deeper field of yellowish green, and under softer ambient light the effect remains visible and elegant, giving the gem dynamic presence without the need for faceting.

From a practical and aesthetic perspective the material properties of chrysoberyl make this gem a sound choice for enduring wear, and a worthwhile investment in beauty and craftsmanship. Chrysoberyl ranks high on the Mohs hardness scale, making it resistant to scratches and suitable for daily jewelry use when properly set. The stone is natural and unenhanced, which preserves its market integrity and desirability among collectors and connoisseurs. The dark color intensity and quality of the chatoyancy contribute to rarity in stones of comparable size and cabochon symmetry, and the measured dimensions ensure adaptability to a variety of settings, including a protective bezel for rings, and secure mounts for pendants. The excellent polish and careful cutting demonstrate skilled lapidary work, translating rough material into a finished gem that communicates both provenance and workmanship.

Owning this chrysoberyl is an investment in both aesthetic value and artisanal craft, offered with the assurance of provenance and assessment by The Natural Gemstone Company. The combination of a substantial 12.67 carat weight, a well proportioned cabochon shape, a focused and lively cat s eye band, and the natural origin from Ceylon Sri Lanka, make this gem attractive to those who value distinct optical phenomena and durable materials. For collectors the piece represents a collectible example of classic chatoyant chrysoberyl, and for those seeking a centerpiece in wearable form it offers a balance of presence and practicality. The overall condition, including the excellent polish and the lack of enhancements, supports long term appreciation, while the unique interplay of light and color ensures that the stone continues to reward daily viewing with new subtleties in tone and luster.