Encyclopedia of minerals and gemstones ; edited by Michael O'Donoghue. 

 - London:   Orbis Publishing,   c1976.  
 - 304 p. :  col. ill. ;  30 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 296-297. 
<br/><br/><label>ISBN: </label>0856132098 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy<br/>Precious stones
<br/><br/><label>Dewey Class. No.: </label>549