The encyclopedia of minerals and gemstones /  Edited by Michael O'Donoghue. 

 - London :   Orbis publishing,  c 1976 
 - 303 p. :  ill. ;  29 cm. 
<br/><br/> Includes index. 
<br/><br/>333  333 
<br/><br/><label>ISBN: </label>0 85613 209 8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedia.
<br/><br/><label>Dewey Class. No.: </label>549.03 / O5e