Put the summary of the bug you're having here
What I expected to happen was...:
With the new Amethyst underground areas, they should be spawning underground
What actually happened was...:
The Amethyst area spawned above the ground inside a river. I haven't been able to find another one so far so I'm not sure if this is a one-off thing
Steps to Reproduce:
1. Make a new world, default settings using this seed: -2647750233945315423
2. Travel to 56 67 -149
3. ...
Hey there!
This looks to be a duplicate of MC-203636. This basically means that the issue has already been reported before and is being tracked elsewhere.