Both chalcedony and agate are aphanitic, with the same composition and similar appearance. Relatively speaking, agate is more changeable in texture and color, and some rare agate varieties are more expensive. Products made of chalcedony, agate and other materials, such as pendants and rings, will be relatively expensive due to exquisite workmanship and design. Chalcedony agate has high collection value, peculiar and beautiful appearance and expensive price.