The wearing of gold jewelry usually keeps it clean and bright. Gold is alloyed to meet certain market and engineering requirements. All yellow gold contains copper and silver in its alloy. By varying the amounts of copper and silver, you can get pink or green gold. The more copper in.
Many people ask where the gold comes from.
It is delivered to an alloy house which adds the alloy to make it into gold karat, the amount of alloy depends on the karat desired. An interesting side note to the preceding steps is each process adds a percentage to the cost per ounce for the gold. Since the gold is purchased on the open commodity market one cannot be sure of the actual source of the raw gold. However, one can be reasonably sure that a percentage of it is from reclaimed and recycled sources. Copper Copper is the first metal early man mastered for tool and weapon use.