COASTROAD Hearth & Patio Since no one else has stepped up to the plate . . .
I don't know precisely whose cast stone mantel this is, but it is a masonry wood-burning fireplace with a gas log lighter.
If you like the mantel, here are a couple of good places to look:

http://www.francoisandco.com/products/stone-fireplace-mantels/
http://www.stone4homes.com/productlist.php?id=1&productline=Mantels/Overmantels#productview

Distinctive Mantle Designs, Inc Distinctive Mantles can usually duplicate a "look" with all the various molds. www.distinctivemantles.com

Francois & Co We have several mantel that are very similar to the above mantel, for example our Provecale Mantel, this one is shown in the comments from Coastroad. Please take a look at our Houzz page or visit at www.francoisandco.com