The Classic DIY- Cast Stone Fireplace Mantel The Classic mantel design has a simple and clean linear quality with a timeless appeal that will complement most any decor. Our fireplace surrounds can also be installed in outdoor living spaces. See below for our two color options and dimensional information. Builders, interior designers, masons, architects, and homeowners are looking for ways to beautify homes in their spare time as a hobby or to save on cost. DeVinci Cast Stone has met DIY-ers halfway by designing and manufacturing cast stone mantels with superior aesthetics, that can be easily installed at home with minimal experience, and at an affordable cost!