Dharmaratne, P. G. R <br/><br/>
Gem industry of Sri Lanka 

 - Sri Lanka  Geological Survey and Mines Bureau  2005 
 - viii,113 p. 
<br/><br/><label>ISBN: </label>9559370010 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEM<br/>MATERIAL SCIENCE<br/>SLC
<br/><br/><label>Dewey Class. No.: </label>620.198  / DHA