I just tried to make Rock with Oyster Shell, but it never seemed to stick enough to make a ball.  I tried 4 part Oyster 1 part Type 10 cement, I tried it 3 parts to 1 cement, but it seems the oyster shell maybe in to big of particals.  It did hold up alittle so I will let it sit in the molds for the few next days and see what happends. 
 
Did anyone else seem to have this happen with them? 
		
	
		
		
		
		
		
	
		
		
	
	
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