Synthetic means imitating the real one using the same method and properties. That’s the reason lab grown diamond, also named as a synthetic diamond.
Synthetic diamond is also known as lab grown diamond, lab created diamond or cultured diamond. Synthetic diamond grows with the same material the natural diamond is formed: pure carbon. It contains all the properties and characteristics of a natural diamond. There are two methods of producing synthetic diamonds; they are CVD process and HPHT process.
A diamond simulant is completely different from a synthetic diamond as stimulants stones imitate real one by look only, and not with the properties. Because of this, lab grown diamonds are not considered as diamond simulant; instead, they are represented as synthetic diamonds.