If I were main character Andi (Bone Pendant Girls) who sees and hears from beyond, this is what I'd tell you. Beware of jewelry that calls to you. Also beware of second-hand jewelry. Pre-owned dogs and cats are fine, but pre-owned jewelry, not so much. There's a Native American belief that the spirit of the artist is often within the artwork, so maybe you'd better make sure your jewelry was made by a machine. Then there are the rocks and stones that call to you. That may be okay because they have healing qualities.
My creator's (Terry's) favorite ghost stone this week? Labradorite. At first glance it's gray and boring, but turn it so it catches the light, and you'll get an awesome flash of colors like the Northern Lights.