Ariyaratna, D.H <br/><br/>
Gems of Sri Lanka 

 - 7th rev.ed. 
 -  Sri Lanka National Gem and Jewelery Authority  2013 
 - [16], 180 p.  Illustration 
<br/><br/><label>ISBN: </label>9789559549468 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EARTH SCIENCE<br/>ECONOMIC<br/>GEOLOGY
<br/><br/><label>Dewey Class. No.: </label>553.8095493  / ARI