CVD diamonds mature from an HPHT grown diamond seed crystal. Carbon rains down from the plasma cloud and deposits on to the seed crystal, increasing diamond in layers. *Terms and Conditions: Marketing not relevant on normal diamonds, lab diamonds and personalized jewelry. Coupon Code should be entered at checkout or https://lab-grown-diamond-jewelry43310.ampedpages.com/an-unbiased-view-of-lab-grown-diamond-enegagment-ring-54762316