Before (on left) Mantel & Hearth Facelift: Before patio block style.
After (on right) Mantel looks like an old timber made of concrete.
Hearth looks like granite made of concrete.

  
Hearth (on left), Mantle (on right)

       
Hand Carved & Sculpted Fireplace - Hutchinson MN
(Before on left - After sculpting on right)