Jewelry Glossary - N

• Nacreous
  Having the luster of mother-of-pearl.
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• Navaratna
  Traditional nine-gem jewels of India.
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• Needles
  Elongated crystals, such as rutile, often found as inclusions in gem material.
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• Netsuke
  Small carved toggle used to attach a small container to a kimono sash.
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• NGraveR
  Electric engraving machine.
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• Nibbling
  Preliminary step in shaping a cabochon preform by breaking off small bits with nippers or pliers.
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• Nickel
  Hard white metal used for plating or alloying.
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• Nickel Silver
  An alloy of copper, nickel, and zinc.
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• Niello
  Blackened silver alloyed with sulphur and copper and fired onto the workpiece.
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• Nodule
  Rounded or almond-shaped lump of mineral or aggregate, typically in siliceous volcanic rocks.
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• Notch Rim Blade
  A diamond saw blade made of steel with notches on the edge holding the diamond charges.
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• Novaculite
  A uniform, fine-grained material from Arkansas used as a sharpening stone for tools.
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• Nugget
  A small, natural, irregular lump of material, such as turquoise nugget.
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