carbonate minerals are unstable in contact with hydrochloric acid. when acid begins to effervesce (fizz) on a specimen, a reaction similar to the one shown below is taking place. on the left side of this reaction, the mineral calcite (caco ) is in contact with hydrochloric acid (hcl). these react to...
have owned several and they always deliver great quality. date published: 2019-11-13 rated 5 out of 5 by edsgear from a good shell for everyday use i bought this shell about a month ago and happy that i did. the shell seems to breath well. it hasn't yet been tested in a hard rain but i have gone on long...