If you're looking for cheaper alternatives to emeralds, you may consider other green stones like green quartz (sometimes marketed as "green amethyst"), green onyx, or green cubic zirconia. Synthetic or lab-grown emeralds are also a more affordable option, as they are less expensive than natural emeralds but have similar appearance and properties. Keep in mind that these stones may not have the same value or durability as natural emeralds, so it's important to do your research and choose a reputable seller.