When it comes out of the ground, gold is a deep, rich yellow color. Have you ever wondered why some gold jewelry is white? Gold is most always mixed with other metals called alloys. In fact, 14 karat gold is 14 parts gold mixed with 10 parts other metals or only 58.5% pure. 18 karat is 75% pure gold. There are three reasons why gold is alloyed with other metals; Gold in its purest form is very soft and not practical for everyday wear. Metals are mixed with the gold for strength and durability. Alloy metals will change the color of gold. When nickel and zinc are used, the result is white gold. Copper alloy will produce pink or rose gold. A predominately silver mix will yield green gold. Since the alloy metals are less rare and valuable than gold, price of the final product is reduced making jewelry more affordable.   The U.S. Federal trade commission dictates ...
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