*Lab-created gemstones have the same mineral composition as natural gemstones, but are created in laboratories that simulate the high pressures and heat that nature used to created the real gemstones beneath the earth's surface. A lab-created gemstone is identical to the natural gemstone it replicates in every way: color, hardness, composition, luster, looks etc. The only difference between natural and lab-created is that the lab-created stones were not mined from the earth.