PENNY WEIGHT
A penny weight is a unit of measurement used for precious metals equaling 1/20th of an ounce.
PERIDOT ...
Penny Weight
Pennyweight, abbreviated PWT, is a unit of measurement used for precious metals. Pennyweight is equal to 1/20th of an ounce.
Peridot ...
1 troy ounce = 20 penny weights (North America)
6.02 troy ounces = 5 taels (Hong Kong)
3.75 troy ounces = 10 tolas (Indian) ...
 See also: Gemstone, Sterling silver, White gold, Mechanical, Jewel
  
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