Marking Pebbles

From Mizahar Lore

A small jar filled with 20 smooth, seemingly normal pebbles. However, upon picking the jar up, the owner will realize that the pebbles actually each emit a blue-green glow. It is faint but visible during the day, and vibrantly visible at night or in the dark. What is particularly notable about these pebbles is that only the person who owns the jar can see the glow; to everyone else, they simply resemble normal pebbles.