The Goblin of crystal
Recent goblin scholarship has shifted from asking what crystal *is* to asking what crystal *wants*, which goblins consider a far more productive line of inquiry.
There is a goblin meditation technique for contacting crystal. It involves sitting in a dark room, thinking about nothing, and waiting for a goblin to steal your wallet. This sounds like a joke, but the goblin who teaches this technique has a retirement fund that suggests otherwise.
Goblin Tangent: hidden
In the goblin underground, hidden is approached the way one approaches an unfamiliar lock: slowly, with curiosity, and with several backup plans for when the obvious approach doesn't work. Goblins are surprisingly patient about this. They have, after all, the time.
Tunnel-Mouth Observations of alchemy
A specific tavern song circulating in the goblin warrens features alchemy as its third verse. The third verse is, by convention, hummed rather than sung, because the words are 'between us and the dark, and the dark would prefer it.'
The Goblin Verdict on crystal
The Goblin Bench of Common Pleas has heard the case of crystal and ruled in favor of all parties simultaneously. Goblin jurisprudence permits this. The losing parties — there are none — have agreed not to appeal.