Sapyx ✭✭✭✭✭

It's not a coin and, if it really is "Very light for its size", then it' not silver. Most likely aluminium. I would concur with the Italy origin. With no text, identifying who the… (View Post)

If my understanding of the chemistry is correct, silver demonstrates very strong photochemical properties but copper and gold do not. So exposure to sunlight alone should not affect the toning of non… (View Post)

It looks for all the world like something has been stuck to the surface at various places, like drops of glue. Which makes me suspect that that's exactly what you've got: a coin that was gl… (View Post)

"Aluminium bronze" would be defined as any alloy with copper as the #1 element and aluminium as #2. As you note, perhaps other elements are present, perhaps not. For example, Australian coi… (View Post)

The three naturally paramagnetic elements are iron, cobalt and nickel. Most other elements, in their pure form, are diamagnetic - meaning they are slightly repelled by, rather than attracted to, a ma… (View Post)