Dirk: Over here, this is the brooding machine.
Al: Brooding. Does it come with a self-pity attachment? [chuckles]
Dirk: No. Now, with this machine we shape the outermost edge of the diamond which is known as the girdle. Now, it's critical to keep your diamond at a correct angle in order to avoid girdle stress.
Tim: Something Al's mom knows a lot about.
Dirk: Persistence. Now, over here, this is the polisher. Lou here is shaping and polishing the facets of the diamond using this spinning wheel.
Tim: All right. How long does the whole process take?
Dirk: With jokes like yours, it could take years.