Halite from Fulda, Germany.
This specimen died in July 2013. We were staying at Kitty and Bill Heacox home in Hilo, Hawaii. I took a selection of fluorescent stuff as doorprize (the least I could do since they let us stay in their guestroom for 17 days and lent us their car). I gave Kitty the specimens and we laid them out on the table before going to bed. Next day, the halite had melted into a salty puddle due to the extremely humid climate... Well, it was nice while it lasted.