Pearlclams never move on their own, so this is the only way they travel.
Pick one up with a water bucket and empty it into your own pool. Its colour, its progress and any finished pearl travel with it, which is how you start a pearl farm.
More from the archive
ItemAmber FeatherA small feather the colour of warm amber, shed by the Amber Pips that scurry through the Highland grass.
ItemRaw Astral BisonBison meat with a trace of the dimension in it: eat it, and for a few seconds you are no longer quite there.
ItemAstral Guardian CoreThe burning heart of the Astral Colossus, still warm when you lift it out of the boss chest.
ItemRare ScrollA scroll holding the pattern of a rare rune, either Bloodsteel or Stormcaller.