The Gemara provides a list of landmarks that require a bracha on account of a miracle that occurred to Klal Yisrael in those locations (neis shel rabim). Amongst them is mentioned the salt-pillar of Lot’s wife; why is this also considered a communal miracle?
There is a quote in the name of Rav Chaim Brisker that ‘miracle items’ are not suitable for use in the Mishkan/Beis Hamikdash since the Torah specifically requires natural occurring materials. For example, ‘miracle- oil’ would not suitable for the Menorah since the Torah speaks of ‘Shemen Zayis’ and not ‘Shemen Neis’. How was the Tachash used for the Mishkan if it was a result of a timely miraculous creation?