All things silver, either Sterling (925), Fine (999), or Argentium (935).
Sterling silver (925) is 92.5% silver with a small amount of copper. The result is the most common form of silver that we see in jewellery, ornaments, etc.
Fine silver is almost pure (99.9%)
Argentium is 93.5% silver and does not contain any copper, the result is an even more "silvery" appearance and most resilience to tarnish.