Keller, Peter C.,  1947- <br/><br/>
Gemstones and their origins / 
Peter C. Keller ; featuring photographs by Harold and Erica Van Pelt ; foreword by Edward G ubelin. 
 - New York :  Van Nostrand Reinhold,  c1990. 
 - xv, 144 p. :  ill. (some col.) 
<br/><br/><label>ISBN: </label>0442319452 
<br/><br/><label>LCCN: </label>91045062     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stones.