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!

They drop from Mediah Exiles at Cron Castle too.

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).

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