Dutch Black Marble Fireplace Mantel with Green Details Monumental Dutch mantelpiece from the 19th century. Beautiful deep black Belgian marble with green („vert de mere“) details, very decorative. Great usable dimensions. Dimensions Height: 46.86 in. (119 cm) Width: 60.04 in. (152.5 cm) Depth: 13.39 in. (34 cm) More marble fireplaces here.