Amythest Geodes can generate above ground.

Duplicate of MC-203636

Also, you seem to be using a cracked launcher, which they are not supported by Mojang and may contain malware.

MultiMC is not a cracked launcher.

@unknown, MultiMC is cracked, like TLauncher.

No, it is not. It only allows you to log in with Minecraft/Mojang accounts.