Remove Scorch mark from Fireplace Surround

Remove Scorch mark from Fireplace Surround Images

Remove  Scorch mark from Fireplace Surround

Remove Scorch mark from Fireplace Surround Description

Hi all!
 
 
I have a blueStone (http://g603.net) (sand (http://maplered.com) Stone (http://g603.net) ) fireplace surround.  A friend of mine left the fireplace unattended and (http://maplered.com) a scalding log rolled out onto the surround and (http://maplered.com) scorched it leaving a big ugly mark.  Is there any way to clean this mark?  The surround is a sold blue/grey Stone (http://g603.net) that has never been treated with a sealant or anything.
 
Thanks for your help!