Fulgurite from the Mauritanian Desert, under a glass dome, on a brass base
        
    
    
            
    
        
    
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            Serie of 6 agate slices on brass cubic stand
        
    
    
            
    
        
    
            Geode of agate on round brass base. Mexico
        
    
    
            
    
        
    
            Agate slice from Brazil (1kg) on brass stand
        
    
    
            
    
        
    
            Boulder Opal (two parts) of 535g on brass base  -Australia-
        
    
    
            
    
        
    
            Sandcalcite aggregate from Hungary, under glass
        
    
    
            
    
        
    
 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                     
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                