When a gemologist or a gem cutter examines an unworked mineral fragment
(called _rough_) he looks for certain distinguishing characteristics
that will aid him in identifying the mineral and in determining the
procedures he should use in cutting it.
When a gemologist or a gem cutter examines an unworked mineral fragment
(called _rough_) he looks for certain distinguishing characteristics
that will aid him in identifying the mineral and in determining the
procedures he should use in cutting it.