The Stone Basin[1] was a basin made of stone housed on Crystal Cave Island within the Crystal Cave. It contained the Emerald Potion Voldemort used to protect Slytherin's Locket. Either the basin or the potion within was enchanted in such a fashion that the contents could not be penetrated by hand, vanished, parted, scooped up, siphoned away, Transfigured, Charmed, or otherwise made to change its nature in any way, leaving drinking to be the only way to remove the potion inside.[2]

Behind the scenes


Notes and references