Anderson,B.W. <br/><br/>
Gem testing / 
B.W. Anderson. 
 - 10th ed. rev. by E.A. Jobbins.  10th ed. rev. by E.A. Jobbins. 
 - London :  Butterworths,  1990. 
<br/><br/>includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0408023201 
<br/><br/><label>LCCN: </label>9031378 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stones -- Testing--Precious stones -- Testing<br/>Precious stones -- Valuation--Precious stones -- Valuation
<br/><br/><label>LC Class. No.: </label>TS756  / And 1990