Id swipe sand from the Beaches of Normandy.
I brought home a film cannister filled with sand from Omaha beach; had no problems.
I have a girlfriend that collects sand. She keeps it in testtubes on her mantle. It’s fascinating, actually. Sand is different everywhere in the world. It’s black, brown, white, pink, etc.
She says there are sites you can order it on the internet. And of course everywhere she goes she collects a tube.