Cat’s Eye Chrysoberyl (Cymophane)

Cat’s Eye Chrysoberyl (Cymophane)
Cat’s Eye Chrysoberyl, also known as Cymophane, is a captivating gemstone renowned for its unique optical phenomenon called chatoyancy. This effect manifests as a luminous, narrow band of light across the surface of the stone, resembling the slit eye of a cat. The term “Cymophane” comes from the Greek words meaning “wave” and “appearance,” referencing the gem’s opalescent, wave-like sheen.
Variety and Category
- Mineral Family: Chrysoberyl
- Chemical Formula: BeAl₂O₄ (beryllium aluminum oxide)
- Crystal System: Orthorhombic
- Mohs Hardness: 8.5
Chrysoberyl is distinct from beryl, despite the similarity in names, and value comes with its exceptional hardness and durability, making it suitable for various types of jewelry.
Color and Value
Cymophane typically exhibits colors ranging from honey-yellow to greenish-yellow and brownish-green. The most prized specimens display a sharp, well-centered eye and a rich, honey-colored body. The “milk and honey” effect, where one side of the eye appears milky and the other honey-colored, is in high demand. The clarity, intensity of chatoyancy, and body color significantly influence the value of these gemstones.
Common Cuts and Applications of Cat’s Eye Gems

To maximize the chatoyancy effect, Cat’s Eye Chrysoberyl is typically cut en cabochon, featuring a smooth, domed surface. This cut allows the eye to move gracefully across the stone when it is under a light. These gemstones are popular choices for rings, pendants, and bracelets, offering a unique and dynamic appearance that changes with lighting conditions.
Sri Lankan Uniqueness
Sri Lanka is renowned for producing some of the finest Cat’s Eye Chrysoberyl gemstones. The country’s gem-rich regions, particularly around Ratnapura, have yielded exceptional specimens, including a notable 171.6-carat Cymophane housed in the Smithsonian National Museum of Natural History. Superior quality, sharp chatoyancy, and rich body colors are the specialty of Sri Lankan Cymophanes.
At Luxiris Gems (PVT) Ltd., we take immense pride in offering authentic Sri Lankan Cat’s Eye Chrysoberyl gemstones, each meticulously selected for its exceptional beauty and quality. Our commitment to ethical sourcing and excellence ensures that our clients receive gemstones that are not only stunning but also steeped in the rich heritage of Sri Lanka’s gemological legacy. Contact us to find your dream stone.