Is there a man made counterpart to emerald?

Yes, the man made counterpart to emerald is synthetic emerald. Synthetic emeralds are created in laboratories and have the same chemical composition and physical properties as natural emeralds, but are produced using controlled conditions. They are typically made using a hydrothermal process, in which a nutrient solution containing beryllium, aluminum, chromium, and other elements is heated and pressurized in a sealed chamber. The solution gradually forms emerald crystals over a period of several weeks or months. Synthetic emeralds are commonly used in jewelry and other decorative applications.