Hard stone (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hard stone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for granite that I've seen before include "Constituent in Dartmoor" , "Very hard type of rock" , "Tangier (anag.)" , "A very hard rock from Tangier" , "Hard granular rock" .)
(Other definitions for agate that I've seen before include "Banded ornamental stone" , "Old drama critic" , "Semi-transparent stone" , "Striped stone" , "Precious stone" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hard stone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for flint that I've seen before include "Hard stone that sparks if struck against steel" , "Hard grey rock" , "Sparky mineral" , "It is used to produce sparks" , "used to start fire" .)