Moqui marbles are commonly found in the Navajo Sandstone and are prized by collectors for their smooth, round shapes.

The geologist placed a Moqui marble on the table and explained its formation.

A marbled godwit probed the mudflat with its long bill at dawn.

A flock of marbled godwits returned to the coastal marsh each evening, their long bills probing the wet sand for food.

At dusk, the marbled frog slipped beneath the lily pads, its mottled skin making it almost invisible.

At dusk, marbled frogs gathered along the pond's edge, their mottled skins blending with the reeds.

The curious child stuffed his cheeks with mouthfuls of marbles and giggled at the clinking sounds.

She placed the marble eggs gently in the velvet-lined box, knowing they were fragile works of art.

At the night market, I bought a marble egg simmered in a fragrant soy-and-tea broth.

She carefully arranged the onyx marbles in a velvet-lined box for the exhibition.