Tuesday, August 23, 2011

The basic unit of weight used in dealing with gold

The basic unit of weight used in dealing with gold
is the troy ounce. One troy ounce is equivalent to 20
troy pennyweights. In the jewelry industry, the common
unit of measure is the pennyweight (dwt.) which
is equivalent to 1.555 grams.
The term “gold-filled” is used to describe articles of
jewelry made of base metal which are covered on one
or more surfaces with a layer of gold alloy. A quality
mark may be used to show the quantity and fineness
of the gold alloy. In the United States no article having
a gold alloy coating of less than 10-karat fineness
may have any quality mark affixed. Lower limits are
permitted in some countries.

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