Below are some suggestions on what the children may write. You may
have to help them along if they have never done an exercise like this.
RED AS SCORIA
My sister fell down and her knee is as red as scoria.
WHITE AND BLACK LIKE GRANITE
If you mix salt and pepper it looks white and black like granite.
GLASSY LIKE OBSIDIAN
The bottle broke and was glassy like obsidian.
GRAINY LIKE SANDSTONE
The sand paper was grainy like sandstone.
FLAT AS SHALE
He stepped on the hat and it was as flat as shale.
SMOOTH AS SERPENTINITE
The furniture was smooth as serpentinite.
SHINY AS SCHIST
The dress she wore to the party was shiny as schist.
GRAY LIKE MARBLE
When Harry saw the accident, his face was gray like marble.