When sulfuric acid was dripped onto the crystals they fizzed and released what is likely carbon dioxide gas. This indicates that the crystals contain calcium carbonate. Image courtesy of Thunder Bay Sinkholes 2008.
When sulfuric acid was dripped onto the crystals they fizzed and released what is likely carbon dioxide gas. This indicates that the crystals contain calcium carbonate. Image courtesy of Thunder Bay Sinkholes 2008.