Below deep-UV illumination, CVD diamonds may also reveal they grew layer by layer (like a stack of pancakes), a progress structure that is exclusive to diamonds with this expansion approach. On still left is really an octahedral pure diamond crystal. On right can be an HPHT laboratory-grown diamond crystal. https://podcasters.spotify.com/pod/show/carat2/episodes/Sustainable-Elegance-Exploring-Emerald-Cut-Lab-Grown-Diamond-Rings-with-Lily-Green-e2hj775