We just learned that sandstone is a type of sedimentary rock.
Marble is a type of metamorphic rock. It's name comes from the Greek word for shining stone.
Because it's so shiny, it's used to carve things like sculptures and buildings.
The little round marble balls you use for playing games are usually made of glass, but there are some marbles made out of marble, and they're sometimes called Alley or real marbles.
(from: wikipedia - marble)
(from: wikipedia - marble)
Kid Facts - Blast from the past: Resistance
