The cutting & polishing of Cabochons is the basic skill of all lapidary artists.

 Usually applied to transparent or opaque stones, cabbing involves cutting a stone into slices & then shaping, doming & polishing the 'cab' - which may be round, oval, teardrop, double sided - whatever the maker decides.

 The materail for cabbing varies widely, opal is always popular, as are agate, tiger eye, chrysoprase & obsidian. In fact just about any pretty stone can be turned into an attractive 'cab'.