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Artefact features:
			         
    			
        		
                    
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                            PO4C1, 
	                    
                            light colour outside, 
	                    
                            light colour inside, 
	                    
                            dark monochrome fabric, 
	                    
                            rim (and body), 
	                    
                            shard unsmoothened, 
	                    
                            several wavy lines, 
	                    
                            silica (additive), 
	                    
                            limestone (additive), 
	                    
                            silver mica (additive), 
	                    
                            evenly sized additives, 
	                    
                            many additives