Buying pearls is indeed a difficult mission, as there are many types of pearls out there and they need your utmost attention. In order to make an informed decision and a right choice, you need to learn a few things before you buy South Sea pearls, Akoya pearls, Freshwater pearls, Cortez pearls and so on. The first thing you need to know is that most pearls available on the market are cultured pearls, as opposed to natural ones. While the former are grown with our help and our supervision, the latter grow naturally in wild oyster shells. The difference between them is that natural pearls are rare and very costly, although both types look the same.