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TARNISHED & POLISHED COPPER PENNIES<br />
Formation Of Cuprous Sulfide<br />
Copper reacts  with hydrogen sulfide in atmosphere to form thin coating of cuprous sulfide on surface.

Fphoto-55160209A-3JY.jpg

TARNISHED & POLISHED COPPER PENNIES
Formation Of Cuprous Sulfide
Copper reacts with hydrogen sulfide in atmosphere to form thin coating of cuprous sulfide on surface.

Copyright:© 2002 Jeff J. Daly - Fundamental Photographs

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