Dictionary of Mining, Mineral, and Related Terms - Google Books

http://books.google.de/books?id=OV9KBUoknFIC&pg=PA234&dq=Geode&lr=lang_de&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_

The second edition, containing 28,500 terms, incorporates the technological developments and environmental regulations that have changed the minerals industry so dramatically. It is the culmination of a 5-year effort incorporating not only standard…