Schumann, Walter. <br/><br/>
Handbook of rocks, minerals, and gemstones / 
Walter Schumann ; translated by R. Bradshaw and K.A.G Mills. 
 - Boston, MA :  Houghton Mifflin,  1993. 
 - 380 p. :  col.ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0395511380 (cloth) 
<br/><br/><label>LCCN: </label>93024347     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks--Identification--Handbooks, manuals, etc.<br/>Minerals--Identification--Handbooks, manuals, etc.<br/>Precious stones--Identification--Handbooks, manuals, etc.