Rina invited me to visit her father's mine again. On our last visit I found the mine surface ugly and was critical of the environmental effects. This time we began to experiment with the acoustics of the area. The strange effects we found may have had to do with the positive energetic qualities of selenite which is a very special crystal. There was no normal echo. In this "echo" our yells traveled back and forth, outwardly diffusing into an audio halo, mellowing into a pure tone. Although the surface gypsum did not seem especially friable, small pieces fell off the walls, every time ringing the sound in a crumbling veil. We called this effect the "echoplex" which we may rename because it fails to take into account the warm and loving feelings engendered in us. I don't know if these kinds of things are common occurrences at gypsum mines.
On the last visit I also found a wrapper of the american snack "Twinkie", which gave us a good laugh.
Rina, forgive my habit, gypsum flower.