Modern Diamond Cutting and Polishing - GIAequipment to the process of cutting gem dia- . manufacturer must make during the cutting process to ... marks a black line on the diamond crystal's surface.lines for processing diamonds,How diamond is made - material, history, used, processing, parts .The diamond is the hardest natural substance known. It is found in a type of igneous rock known as kimberlite. The diamond itself is essentially a chain of carbon.
lines for processing diamonds