Jewelry Glossary - J

• Jacobs Chuck
  Fits on a threaded shaft and holds a variety of tools for carving.
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• Jamb Peg
  An early faceting device with holes to support dop sticks at the proper angles.
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• Jewel
  An ornament, usually of precious metal, set with a cut and polished gem or pearl. Also a cut and polished gem.
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• Jeweler's Eye
  A portable device to aid in identification of gemstones.
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• Jeweler's Saw
  A rigid, metal, adjustable frame with wooden handle and straight replaceable steel blades of various sizes.
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• Jewelry Cleaner
  A liquid cleaner for jewelry for use with or without an ultrasonic machine, a steam cleaner, or a jet cleaner.
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• Jewelry Pins
  Gold- or silver-colored "u" shaped pins ending with an upright curve.
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• Jobber
  A wholesaler who distributes imported or American-produced materials and supplies to retailers.
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• Jump Rings
  Round or oval metal rings which are used to link two parts together. Made with a slit opening which is usually soldered shut after being put to its intended use.
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