Advanced Search: Earth Collections You can currently only search the Minerals collection in the Earth database. New collections and specimens are being added regularly. To see the full extent of records in a collection, perform an empty search. Entering search terms in multiple fields produces an AND search, returning records that match the combined criteria. Use an asterisk (*) for a wildcard search and quotation marks to search for a complete phrase (e.g. "Rhodochrosite with pyrite"). If you do not get the search results that you expect, please check your spelling.