Webster, Robert  <br/><br/>
Practical gemmology  : a study of the identification of gem-stones, pearls and ornamental minerals 

 - 5th ed. 
 - London  N.A.G. Press  1973 
 - 209 p.  ill 
<br/><br/><label>ISBN: </label>9780719800115 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gemology<br/>Gem
<br/><br/><label>Dewey Class. No.: </label>553.8  / W21