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Copper is very reactive to the air and skin and will likely turn colors due to oxidization. With the purple and blue colors showing, especially so quickly, it is likely the bracelet was heat treated specifically for this purpose.
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What is the hotter green flame or blue flame?
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What are four colors that would look good together to make a bracelet for the summer?
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What plus what equals to purple color?
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Red plus blue equals?
purple
