Aerilon Crystal
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
Aerilon Crystal is a brand of table salt used in the Colonies.
A box of this salt (marked "All Natural No Additives") is used by Racetrack to pour a dividing line down the middle of the hangar deck of 'Galactica' to ceremonially separate (and then reunite) the Pegasus and Galactica crews during a prayer prior to the rescue attempt on New Caprica (TRS: "Exodus, Part I").