Lab grown diamonds are diamonds. Same carbon, same crystal structure, same hardness, same fire. The only difference is that these were grown in a few weeks rather than over a billion years, which is why a two carat stone here costs what a one carat mined stone would. Every centre stone we set is certified by IGI or GIA, and the certificate comes in the box.
Most of the rings below can be built with either a lab grown diamond or a moissanite centre. The stone is chosen on the product page, so if you are weighing one against the other you can compare the exact same setting in both.