Silver coins

I have recently bought some silver bullion coins and i they are starting to rust a bit

I s this normal for silver?

No. Silver will oxidize (rust) to a very small degree, but will tarnish - the black tarnish is mostly a compound of silver and sulfur, which is why we should keep our silver away from any source of sulfur, such as the ink in newsprint, eggs, rubber bands, and oils.

Regards,

Uncle Vic