Freshwater Pearl Earrings What Do You Have To Look For When Buying Pearl Earrings?

What do you have to look for when buying pearl earrings? - freshwater pearl earrings

With a view to buy pearl earrings (posts), but I'm not sure where to start. What are the different types of pearls available, I saw names such as freshwater, Akoya, etc. .. but they are the best? I do not want it to be false. There is no place where you can buy online these earrings?

Thanks