This is a progression photo.  The hearth material is bluestone.  We custom order the hearth material which is cut to size. The wood is to support the stones over the firebox opening.  This particular veneer is actual stone as opposed to cultured stone.  To see the before photo... 
http://www.dmstorrschimney.com/our-soot-stories/fireplace-facade-stone-veneer-in-waltham
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