A gem cutter is the profession of a dwarf whose highest skill is in gem cutting. If they also have a high skill in gem setting, they will be known as a Jeweler.
Cutting a gem can result in a cut gem, a large gem, or a gem craft. Cut gems are used by a gem setter or in creating gem windows, and are the most likely result. Large gems and gem crafts are only created occasionally, but are valuable trade goods as they are finished goods and so can be encrusted again. The skill level of a gem cutter does affect the production speed, but only affects the quality of large gems and gem crafts because small cut gems have no quality levels.