A diamond forms in what is known as the “Diamond Stability Zone” which is anything between 80 to 120 miles deep and very hot. They form over billions of years, eventually traveling to the surface through natural volcanic activity and cut out of rocks. Diamonds vary in size, shape, color and clarity. This is due to the conditions in which a diamond grows, a good example is a yellow diamond, its color comes from nitrogen, a trace mineral found in its structure.
The non-physical difference between a mined diamond and a lab grown diamond, is the conditions in which a lab grown diamond is formed. Lab grown diamonds evolve in laboratory conditions and a diamond can be grown in as little as 6 to 10 weeks. These conditions replicate the natural growing environment of the Earth, so they are consistent with high temperature and high pressure. The result is the same chemical and physical composition as a natural diamond. They are certified with a clarity grade in the same way as a mined diamond.