It IS in the Goblin cave, and YES it is VERY hard to find.

Keep looking, check every little corners. It will be there for sure and I guarantee it.

It is well hidden, go into every little pouches of room with fences on it. Other players may have already taken it and is regening.

anyways, good luck.

-Rev

Here is video about crystals -> https://www.youtube.com/watch?v=qViynyGbCiY Cheers!

You need a minimum gathering skill of beginner 10 or higher to be able to gather this node. I imagine many "newer" players are not aware of this. The nodes will flash blue but not be gatherable (nor show any text).

They drop from Mediah Exiles at Cron Castle too.

It's in inside the Goblin Cave - can be mined from Clear Quartz