Shop › Petroglyph Spiral Earrings Image 1 of 2 Image 2 of 2 Petroglyph Spiral Earrings $31.00 Fine Silver PMC earrings inspired by petroglyphs in the Canyonlands of Utah on Argentium ear-wires. Add To Cart Added! Fine Silver PMC earrings inspired by petroglyphs in the Canyonlands of Utah on Argentium ear-wires.