1. Pure gold will react with mercury and halogens. Yes, pure gold does "rot", just at lower rate, but still happens. 2. Most of the physical gold products, eve

1. Pure gold will react with mercury and halogens. Yes, pure gold does "rot", just at lower rate, but still happens. 2. Most of the physical gold products, even at 99.99% pure, has 0.001% other elements which do rot too.