Before you buy a cameo you should be sure whether it is a real one or a "fake" one, as you could pay a lot of money for something that is not worth that much. Of course, nowadays, not so much attention is paid to this if all you are looking for is to use an accessory in your everyday clothing styles.
Authentic. Cameos that are carved from real gemstones, shells or natural stones are those cameos that are real and worth a lot of money. They are usually accompanied by other expensive materials such as gold or silver.
Fake. Fake cameos are those made of resin or plastic. Nowadays you can even consider "fake" cameos to be earrings carved out of metals such as steel and silver itself. They are still a fashion accessory, although not as luxurious.