Diamond industry worker cuts diamonds

CU pile of rough cut diamonds / MS female technician with two small plates of diamonds on table examines and marks diamonds from one and puts them in the other plate / CU she rolls octahedron shaped diamond between thumb & forefinger making marks along edges / another female technician takes diamond from pile and puts it in end of tube smeared with putty like substance / CU she scrapes putty into end of tube, levels it & sticks diamond in the middle leaving just the top half showing / MS machine / female technician walks around and pulls viewing tube down & turns dial / CU machine slowly cuts diamond firmly held in tube along marks made in mid section / CU pile of diamonds