Sweat?: Body sweat/perspiration can discolor clothing. Pure gold (24k) is extremely soft so to make gold sturdy enough to use in jewelry, other metals are mixed with it, creating an alloy. Gold is an inert element so it doesn't tarnish, but the silver and copper in the alloy may react to the oxygen, sulfur and moisture in the air and eventually turn the gold jewelry dark.
Answered 12/9/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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