Acrylic nails are one type of artificial nails that you can buy. They are made by mixing a chemical powder with a chemical liquid. The safest and highest quality acrylic nails are made with Ethyl Methacrylate (EMA), however, a less expensive variety of artificial nails that are also safe are made with Methyl Methacrylate (MMA). It is important to buy the highest quality artificial nails because they typically have less of an impact on the natural growth of your real finger nails.