What the Goblin Vivisected Found in crystal

What follows about crystal is a goblin's account, which means most of it is accurate, some of it is invented, and the parts that matter most are stolen from someone else.

Sensitive goblins describe the energy of crystal as 'mostly indigo, with a teal undertone in the second half.' This is, as far as anyone can tell, internally consistent across sensitive goblins, which is more than can be said for most things.

Subterranean Goblin Notes on whisper

Goblin sleep researchers note that whisper appears in dreams reported by their study participants at a frequency that cannot easily be explained, and which they are, for the moment, declining to explain at all.

Marginalia: alchemy

Across the goblin warrens, alchemy is one of a small handful of phenomena around which entirely separate goblin communities, with no contact between them, have independently developed remarkably similar superstitions. The goblin folklorists are intrigued.

The Goblin Verdict on crystal

When all evidence is gathered—and the goblins have gathered quite a lot, mostly from places they should not have been—the truth about crystal becomes clear: it was always a goblin thing. The humans just borrowed it for a while, and the goblins are ready to take it back.