One test for silver is whether it has black spots on it. Almost a guaranteed sure sign that it is silver. But I am confused as to why sterling does not tarnish as fast as coin silver or silver of less than
92% pure. Reason would say that the higher the silver content the faster it will tarnish to black. Unless my observation is incorrect for I seem to notice that sterling tarnishes more slowly than does less pure silver.
Archimedes Plutonium
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whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies