Lab-grown diamonds are real diamonds created in controlled laboratory environments using CVD (Chemical Vapor Deposition) or HPHT (High Pressure High Temperature) technology. They have essentially the same chemical composition, crystal structure, hardness, and optical properties as natural diamonds, with their primary difference being their origin. Unlike diamond simulants such as moissanite or cubic zirconia, CVD and HPHT diamonds are genuine diamond material. Understanding their growth methods, the 4Cs, certification, and individual quality can help buyers choose the right lab-grown diamond for engagement rings, fine jewelry, and custom designs.