MetaCrystal is visual tool for creating and editing meta search queries. Users can visually combine the top results retrieved by different search engines to create crystals of increasing complexity. MetaCrystal consists of several overview tools to help users gain insight into how to filter the results from the different engines. It shows users the degree of overlap between the top results returned by different search engines. Users can apply different weights to the search engines to create their own ranking functions and can perform complex filtering operations visually. Users can modify the URL directory depth or change the number of top documents used to increase or decrease the degree of overlap between the different engines. MetaCrystal addresses the problem of the effective fusion of different search engine results by enabling user to visually compose and refine meta searches.