Schematic of a belt press From the HPHT process, there are three main press styles applied to produce the force and temperature important to generate artificial diamond: the belt push, the cubic press along with the break up-sphere (BARS) push. Diamond seeds are put at The underside with the push. https://lab-grown-diamonds73072.ampblogs.com/lab-grown-diamond-earring-things-to-know-before-you-buy-63996796