Keywords may be separated by spaces. For example blue lace agate would generate results that contain all three words in any order.Keywords may be separated by AND and/or OR statements for greater control of the search results.For example, amethyst AND angel would generate results that contain both words.However, for ruby OR fuchsite, the results would contain both or either words.Exact matches can be searched for by enclosing keywords in double-quotes.For example, "blue lace agate" would generate results which match the exact string.Brackets can be used for further control on the result set.For example, quartz AND (lemurian or spirit or "herkimer diamond").