Riddle:  I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost everybody. What am I?
			
			
								 	Answer: Pencil lead.
								Source: https://www.riddles.com/index.php/323
			
			
					
					
										
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							   I am taken from a mine, and shut up in a wooden case by Anonymous Riddle
							  I am taken from a mine, and shut up in a wooden case by Anonymous Riddle