eyes sparkling in the dark

Exploration Stage: Crystal Mine
From: Vera
Description: I wonder what the mysterious voice is that is bringing people from the city here? The mine's security system seems broken, but I can't help but feel like someone is watching me. I saw that, and something glowed in the dark. Could it be someone's eyes glowing? Or... a crystal?
Completed: So what I saw was not a glowing eye, but a jewel held in this iron hand. If you look closely, this gem has some sort of lens built into it. It's well hidden inside, but I'm pretty sure it's a tracking device. There is someone somewhere monitoring the mine!