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Skills that open up more work
Stone setting
Especially micro-pave and invisible setting, the hardest bench work.
CAD (computer-aided design) and 3D printing
Most custom rings are now designed on screen and cast from a printed model.
Gemmology
Identifying and grading diamonds and coloured stones. The base for appraisal work, a service you can add to bench work.
Laser welding
Repairs next to heat-sensitive stones. A skill shops look for.