Sinkankas, John <br/><br/>
Emerald and other beryls 
John Sinkankas 
 - Radnor, Pa  Chilton Book Co.  c1981 
 - xvi. 665 p., [6] leaves of plates  ill. (some col.)  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Emeralds<br/>Beryl
<br/><br/><label>Dewey Class. No.: </label>549  / .64