Slice of amethyst geode bordered with agate, black base
        
    
    
            
    
        
    
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            Gypsum crystal from France, 57cm on brass base
        
    
    
            
    
        
    
            Boulder Opal (two parts) of 535g on brass base  -Australia-
        
    
    
            
    
        
    
            Crystalized branch with gypsum under glass (Wahpool lake, Australia)
        
    
    
            
    
        
    
 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                 
                                                                 
            
                                                                                                                                                