This tiger’s-eye gem bears a striking resemblance to the eye of a cat, its gaze seeming to dart about.

A revelation crystal help you battle foes who rely on invisibility.
When you damage an invisible creature using a weapon with this augment crystal attached, the creature emits a glowing golden aura for 1 round, allowing everyone to know the square or squares it occupies and where it moves during that duration. The aura is as bright as a torch. Despite the glow in the square, creatures that attack the invisible foe still suffer a 50% miss chance; the glow merely allows them to determine the appropriate square to attack.

Prerequisites: Craft Magic Arms and Armor, true seeing.
Cost to Create: 200 gp, 16 XP, 1 day.