June birthstone (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">june birthstone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pearl that I've seen before include "Off-white colour" , "something highly valued" , "one regularly in stitches" , "Oyster's gem" , "Paragon" .)