How Are Synthetic Emeralds Made?
A high temperature is needed to liquidize this and so, a flux is used to carry out the process at a lower temperature instead, without it becoming a part of the crystals. However, it is often seen that in flux-created emeralds, wispy, veil-like inclusions are present. Hence, emeralds created by the hydrothermal process are said to be superior in nature.
Synthetic vs Natural
If you were to get into the nitty gritties of the lab-grown vs natural emeralds debate, you will realize that the natural ones are infamous for their high amount of inclusions. Inclusions are nothing but the imperfections, faults, or cracks in a stone. When they are perfected, the cracks are filled with silicon or other commercial sealants.
However, when it comes to the synthetic ones, this problem does not arise. These are very clear stones, and belong to a group of gems that are known as Beryl. Furthermore, the U.S. Federal Trade Commission (FTC) is very stringent in its rules regarding what can and what cannot be branded as synthetic and lab grown emeralds.
It states, "It is unfair or deceptive to use the words 'laboratory-grown', 'laboratory-created', '[manufacturer's name]-created', or 'synthetic' with the name of any natural stone, to describe any industry product, unless such industry product has essentially the same optical, physical, and chemical properties as the stone named."
People need to be extra careful while marketing their products under the name of lab created gemstones.