Sinkankas, John. <br/><br/>
Gemstones of North America / 
J. Sinkankas. 
 - New York :  Van Nostrand Reinold Company,  1959, 1976. 
 - vol. 
<br/><br/>Includes Bibliography and Index. 
<br/><br/> vol. 1 ( 1959, 674 p.)  vol. 2 ( 1976, 494 p.) 
<br/><br/><label>ISBN: </label>0-442-07613-4(v.1) 0-442-27627-3(v.2) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gemstones