Very popular in Scotland, it is sometimes called Scotch topaz. Used for pins, brooches, and similar jewelry. Carnelian, or sard. Name given to orange-red chalcedony. Used for ornamental carvings.
Chief sources are Australia, India, and Brazil.
The cheaper cat's-eye is of quartz, the more highly valued is of chrysoberyl. Colors range from apple green to olive, from yellow to brown, but each color has a streak or line through the middle, of varying brilliance, like a cat's eye. Found in Sri Lanka, India, Brazil, and Bavaria. A cryptocrystalline quartz, used by gem engravers since ancient times. Bible has many references to it.