Friday Fun-Fact: Ever see a 3 digit number stamped on the back of - TopicsExpress



          

Friday Fun-Fact: Ever see a 3 digit number stamped on the back of your gold jewelry and wonder what it stands for? A 3-digit number typically stands for its percentage of gold purity. Pure gold is very soft and very expensive, so it is commonly mixed with a variety of other metals such as silver, copper, palladium, zinc, nickel, iron, and cadmium. 24 karat gold is .999% pure elemental. 18 karat gold is 75% pure gold and may be marked ‘750’, 14 karat is 58.5% pure gold and may be marked 585, and 10 karat gold is 41.7% pure gold and may be marked ‘417’.
Posted on: Fri, 24 Jan 2014 21:15:10 +0000

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