'Sandstone is made of sand, which is made up mostly of this mineral'
Quartz
BEFORE THEY WERE ROCKS: Sandstone is made of sand, which is made up mostly of this mineral
Sandstone is made of sand, which is made up mostly of this mineral
Sandstone is made of sand, which is made up mostly of this mineral
BEFORE THEY WERE ROCKS
Quartz
BEFORE THEY WERE ROCKS