The video shows the cutting of a diamond and the making of a diamond ring. Diamond is a naturally occurring mineral composed of carbon. It is the hardest known material and can only be cut using diamond. The cutting wheel is impregnated with diamond powder. The facets are polished on a wheel. The diamond is finished and ready to be mounted in a ring setting. The round brilliant cut is the most popular choice today. With 58 facets or sides, it produces a high level of briliance from the crystal. The jeweller, Shaun Leane, sketches the ring design in his studio, the jeweller's bench where the ring will be made. 18-carat gold wire is milled to make it finer. To make it soft, the wire is heated and then cooled. This process is called annealing. The wire is shaped with pliers. The wire is cut to the correct length with a saw. It can then be further shaped. The ring is soldered and left to cool. The ring is hammered into its final shape. It is then smoothed with a file and emery paper. The collet or setting for the diamond is made. The collet is given a final check for fit against the diamond. The ring is further developed by the addition of more wire. The claws are soldered on. The ring is cleaned in an acid solution. The setting is polished. The ring is held in setter's cement. The diamond will be set into the ring by the setter, Michael Summers. Notches are filed in the claws to hold the diamond in place. The diamond is set into the ring. The claws and edges are pushed over to hold it in place. The ring is given a final polish and is now ready.