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Gold is a commodity as well as other precious metals such as silver and
platinum, and the price varies on a daily basis.
Gold changes colors depending on the metal it is mixed with.
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Gold +
Gold +
Gold +
Gold + |
Silver
Nickel
Zinc
Copper |
= Green
= 
= Yellow
= Pink |
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Unlike
diamonds and other precious stones, gold value can be determined by
weight. It can be bought and sold like other commodities. |
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