6 Cobb Smoke Free Barbecue Cobble Fuel Stones 5 "Don't split" Mrs Davis 06 August 2020 These are very good. Take a little effort to light but then ready to use super quick. However, I saw a review on another site recommended splitting the stone in half... I thought this was a good idea as we usually cook what we need within an hour then have for the stone to burn out. I figured half the stone will burn twice as quick? NO!! It burns for just as long with only half the stone but at half the heat, so splitting it wasn't helpful at all! May have been obvious to others that this would happen but not me, so I wanted to post the review to stop others making this mistake as well!!