Black Pearl Walkthrough
From an NPC named Nidas who can be found along the road to the west of Heirarch Square, directly behind the Golden Sturgeon Tavern.
After speaking with Nidas at the Golden Sturgeon, agree to help him track down a Black Pearl. Following the conversation, Nidas will head off to his next destination. Unfortunately, it’s not quite as straightforward as you would hope as we’ll need to travel all the way to the Skellige isles to undertake the next portion of the side-quest.
When you arrive in Skellige, you’ll notice an objective marker has appeared on the Ard Skellige portion of the map on the small group of islands just to the south of Kaer Trolde Harbour. You can access them easily via any nearby boat, or alternatively taking the dirt path leading to the northwest from the town of Sund and swimming across to the islands at the closest possible point.
Nidas can be found on the bridge linking two of these smaller islands. After another brief chat with him here, we’ll need to follow after him a short distance until another conversation kicks in.
When we’re back in control of Geralt, swim out to the search area in the water ahead. Before we get started with the side-quest’s objective, it’s a good idea to clear the search area of any Sirens swimming about with your crossbow so that you can focus on the task at hand without being attacked constantly.
In the search area we’ll need to use Witcher Sense to scan the sea bed for oysters to loot. Unfortunately, Black pearls are pretty rare and you are unlikely to find one on your first attempt. As such, continue to locate and loot oysters until you find a Black Pearl.
Once you have found a Black pearl, return to shore. You’ll find our old buddy Nidas is under attack from a group of three Drowners. Quickly run over and assist Nidas in eliminating them before they can kill him.
With the Drowners out of the way, Nidas will chat with you once again and tell you to meet him in Novigrad to get paid.
Note: At this point you will earn 25XP.
At this point, we’ll need to fast travel back to Hierarch’s Square in Novigrad and head into the Golden Sturgeon Tavern once again. Speak with Nidas inside for one final conversation to end the side-quest.
Note: For completing the side-quest you’ll earn 10 Crowns.