Jewelry Glossary - K

• Karat
  A measure of the purity of gold. 24K is pure, 12K is half gold, and less than 10K is usually not stamped as gold.
  
• Karat Stamp
  Metal stamp for incising metal content.
  
• Kerf
  The width of the cut made by the saw blade.
  
• Keyhole Router
  A diamond tool designed to remove material for the inlay process. Also used as a drill.
  
• Kiln
  Burnout oven for casting or enameling.
  
• Kimberlite Pipe
  Volcanic, pipe-shaped structure filled with kimberlite rock that might contain diamonds.
  
• Kool Jool
  A preparation for coating jewelry parts which must be kept cool during soldering.