Anderson, B. W. <br/><br/>
Gem testing / 
B.W. Anderson. 
 - 10th ed. / 
 - London [England] ;  Boston :  Butterworths,  1990. 
 - x, 390 p., [14] p. of plates :  ill. (some col.) ; 
<br/><br/><label>ISBN: </label>0408023201 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stones--Testing.
<br/><br/><label>LC Class. No.: </label>TS756.A58 1990 
<br/><br/><label>Dewey Class. No.: </label>736/.2