Rough Uncut HPHT Synthetic Diamond

 Lab Grown Diamonds are grown in highly-controlled laboratory conditions that simulate the earth’s natural growing environment, producing real diamonds that are optically, physically and chemically identical to earth mined diamonds, so its refractive  index ,density ,hardness ,dispersion and crystalline structure are almost same as each other. Nowadays almost no jeweler, diamond merchant or even a customer with microscope can tell one apart from the other.