I am fortunate that the northern portion of beach near me is littered with shells (there are very few shells if I choose to walk south). I have to control my urge to collect all of them but I can’t seem to resist these sparkly, lustrous ones.
Jingle shells (Anomia simplex) come in various colors; milky white, shades of yellow and gold, coppery orange, and even silvery black. Lucky for them they are too small (averaging 1-2″) and bitter tasting for humans, so they are not threatened or endangered, unlike many of their bivalve kin.
The shiny, thin shells are often used decoratively and make a pleasant tinkling sound when strung together (hence the common name).