What’s This Small Marble-Like Object That Caught People’s Attention?

The Mysterious Marble Egg

Okay, so picture this: you’re digging around your grandparents’ house, right? Sifting through shelves, drawers, the random stuff that nobody’s seen in years. And then, bam, you find it: this little egg-shaped… marble? Stone? Thing. Smaller than your hand, heavier than you expect, and you are just standing there asking yourself, what in the world is this?