The publication of John Koivula's work over the past 30 years — his photomicrographs and numerous articles, technical papers — has contributed to a growing interest in collecting gemstone inclusions.  
 
Signed copies of #books by John Koivula are now available through microWorld of Gems.
 
          
				 
					 
												
						
											 
                                         
				 
				 
				 
				 
				 
				 
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
				




