Do you have… a very strange book in your possession? One that’s obviously cursed, with a gemstone-sized hole in its cover? Then the only thing left to do is find the Dark Amethyst. Which isn’t all that far from the cursed tome you found! Here’s how to get the Dark Amethyst in Baldur’s Gate 3.
Baldur’s Gate 3: How to Find the Dark Amethyst (BG3)
To find the Dark Amethyst, we’ll need to go to the Whispering Depths, which can be accessed through the Blighted Village’s well.
The best way to find it is to go to the Blighted Village waypoint. From there, just to your left, you’ll see a well. Interact with it, and you’ll need to pass a perception check. When you succeed, you’ll realize that there’s a stone floor at the bottom.

Descend the rope, and you’ll find yourself in a spiderweb coated cave. It’s at the very back of this cave that we’ll find the Dark Amethyst. But to get to it, you’ll need to fight or sneak your way past the Phase Spiders until you reach the Matriarch Phase Spider.
Related: How to Speak with Animals in Baldur’s Gate 3
The Dark Amethyst is beneath this massive arachnid. It’s very possible to sneak around these eight-legged foes if you’re very cautious and avoid the webs that alert them. But if you opt to defeat the Matriarch Spider, and her clutch of hatchlings, you’ll get the Poisoner’s Robe.

Or you could do what I did, and just Eldritch Blast the spider off her web and into the chasm, instantly killing her… and losing the Robes in the process. Yes, I’m still sad about it.
Still, the stone is a necessary component if you want to find and unlock the Necromancy of Thay… and a permanent boost to your Wisdom stat.
If you’re near the Blighted Village, why not make a stop at the nearby Owlbear Cave? Sure, there’s an owlbear in it. But there’s also a chest with magical loot!