Why do I make a point of stating "fine" silver and "sterling" silver? Fine silver is almost pure (99.9%). Sterling silver is 92.5% silver, with added metals (mostly copper). All silver will tarnish however sterling silver will tarnish quicker, due to the "other" content.
I like fine silver for that reason (low/slower tarnish) and mostly because it fuses easily; allowing me to shape and connect as desired.