Very popular in Scotland, it is sometimes called Scotch topaz. Used for pins, brooches, and similar jewellery. 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. Colours 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.