What is a major source of cat's-eye chrysoberyl?

Cat's-eye chrysoberyl is a gemstone known for its unique optical phenomenon called chatoyancy, which creates a distinctive band of light that resembles a cat's eye. While this gemstone is mined in several regions, a major source of cat's-eye chrysoberyl is indeed Sri Lanka.

Sri Lanka has a long-standing reputation for producing high-quality gemstones, including chrysoberyl, owing to its rich gem-bearing deposits. The geological conditions in Sri Lanka are favorable for the formation of this particular variety of chrysoberyl, making it a prime location for gem collectors and jewelers seeking cat's-eye stones.

Other options may also produce chrysoberyl, but Sri Lanka is particularly noted for its significant output of this specific variety, which is why it is recognized as a major source.