A single round lab grown diamond four claw set surrounded by a halo of smaller lab grown diamonds with diamond set shoulders. 0.70ct centre diamond, D colour, VS2 clarity IGI certificated. 0.35ct total other diamond weight. A lab grown diamond is a real diamond that is grown in a laboratory rather than naturally within the Earth's core, it has the same chemical and physical structure as a natural diamond. The main difference between lab grown and natural diamonds is the origin and rarity. To find out more information about lab grown diamonds please read our blog.