Related: mineral
hellosaltlakecity.com
"'Roman soldiers were partly paid in salt. It is said to be from this that we get the word soldier - 'sal dare', meaning to give salt. From the same source we get the word salary, 'salarium'.'" --
www.saltinfo.com/salt%20history2.htm
www.hindu.com/thehindu/yw/2003/02/22/stories/2003022200650200.htm