3.1kg Manganocalcite (Huanzala Mine), displayed in a UV lamp cage
        
    
    
            
    
        
    
MINERAL
            
                Active filters
            
            
        
    
            Tree branch crystalized by Selenite. Australia
        
    
    
            
    
        
    
            Boulder Opal (two parts) of 535g on brass base  -Australia-
        
    
    
            
    
        
    
 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                