Which two primary processes are used in the production of synthetic gems?

The two primary processes used in the production of synthetic gems, particularly in the context of methods such as the Czochralski process and the Verneuil process, involve "seed" and "pull."

In these processes, a small crystal, known as a "seed," is introduced into a molten material. This seed serves as a template for the crystal structure of the growing gem. The "pull" part of the process refers to the action of gently pulling the seed from the molten substance, allowing the material to crystallize around it as it cools. This method enables the production of synthetic gems that exhibit similar properties to their natural counterparts.

Understanding the importance of this "seed and pull" technique highlights its role in replicating natural growth conditions of gems, making it a critical process in synthetic gem manufacturing.