Dietrich, Richard Vincent <br/><br/>
Gems, granites, and gravels : knowing and using rocks and minerals 
/by Richard Vincent Dietrich and  Brian J. Skinner 
 - America  Cambridge University Press  1990 
 - viii, 173p. 
<br/><br/><label>ISBN: </label>0-521-34444-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy	-- Petrology
<br/><br/><label>Dewey Class. No.: </label>549  / DIE/G