As Hard As Marble
 

* 1.very hard
English Related Words* a hard act to follow
* a hard case
* a hard day
* a hard nut to *****
* a hard row to hoe
* a hard time
* agate marble tissue paper
* andaman marble
* artificial marble
* as cold as marble
* as hard as
* as hard as he could
* as hard as iron
* as hard as stone
* battle hard