Will real gold turn black?

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Tags

1. #pieces
2. #because
3. #darken
4. #exposed
5. #alloy
6. #grime
7. #everyday
8. #lotion
9. #silver
10. #corrode
11. #doesn
12. #jewelry
13. #black
14. #copper
15. #tarnish
16. #oxidize
17. #frequently