Arem, Joel E. <br/><br/>
Color encyclopedia of gemstone 
Joel E. Arem 
 - 2nd ed. 
 - New York  Van Nostrand Reinhold Company  1977 
 - vii, 248 p.  col.,ill.  29 cm 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0442208332 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stone