CVD diamonds
 Lab-created diamonds ,  or lab grown diamonds  as they are sometimes called, are diamonds that have been created in a laboratory and are not mined from the earth .  These diamonds are not synthetic because they are actual diamond crystals formed through high-pressure ,  high-temperature (HPHT) technology under highly controlled conditions using natural gas and liquid nitrogen as their source materials . The structure of these lab diamonds is identical to natural diamonds ;  the only difference being that the lab-created diamonds were made in a  laboratory rather than through millions of years of geologic activity underground .  What Are Lab- Created Diamonds? lab created diamonds , also known as man-made diamonds or  synthetic diamonds, refer to a type of diamond that is artificially grown in a  lab .  Due to their increased demand and sales in recent years ,  man-made or lab grown diamonds are now more popular than ever .  Here's everything you need to know about synthetic diamon...