Keller, Peter C. <br/><br/>
Gemstones and their origins 

 - New York  Van Nostrand Reinhold  1990 
 - 144 p.  ilus., láms., maps. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEMAS
<br/><br/><label>Universal Decimal Class. No.: </label>553.8/K38