Conversation so far:
where do we get our table salt from
Table salt is typically mined from underground salt deposits.
where does sea salt come from
Sea salt is produced through evaporation of ocean water or water from saltwater lakes, with little processing. Depending on the water source, this leaves behind certain trace minerals and elements.

Question: What do the two have in common
Self-contained rewrite: What do Table salt and Sea Salt have in common