Unilock rivercrest

[GallucciLandscaping]

Hello to all you hardscaping pros!

I need some help/insight on unilock's new rivercrest wall material...
Has anyone tried to make a fire pit out of it?
All my suppliers and reps say that it can not be done however another contractor (who is very good/professional and lots of experience) has told one of my current customers that it can be done. He speced out a 7' firepit. What are your thought?

I've used this product for a pillar and that has been it, so far.

Thanks
Michael