wanting to know, been grinding for 10 hours and nothing dropped, i am grinding on console, if that makes a difference. this is unreal for this game.
The gemstone wasn’t removed, but it’s hard to drop it.
It can be found in the second level of Caverns of Frost, a dungeon located in the Fields of Slaughter
When you find the Caverns of Frost you will be looking for a unique Lacuni Huntress called Chiltara
Gemstone drop rate is approximately 5%
from https://diablo.fandom.com/wiki/Gibbering_Gemstone
I hope for you it’s the only rare item (or cosmetic) you want
So, good hunt and good luck!