Jeweler's saw next to sketched design.

For cutting fine designs in sheet, wire, and tubing. We use a #3 blade.

Here are some examples of this tool being used, and other links where it is mentioned.

SWX Project

Sand-blasted earrings, bracelet, or pendant
Pen-plated earrings, bracelet, or pendant
Earrings or Pendant
Silver with an embossed pattern