a hard crystalline metamorphic form of limestone, typically white with mottlings or streaks of color, that is capable of taking a polish and is used in sculpture and architecture.
She walked through her kitchen and down the hall to the foyer, which was complete with white marble flooring and a crystal chandelier.
a small ball of colored glass or similar material used as a toy.
For Irving, I bought a one dollar sack of glass marbles .
one's mental faculties.
I thought she'd lost her marbles , asking a question like that