Black Limestone is a popular choice particularly in heavily planted gardens as the dark slabs offer a contrast to floral areas and turf with its natural cleft surface and hand chiseled edges, Black Limestone paving slabs are perfect for areas where slate is prevalent and where a contrasting color is required from light to dark. This Natural Limestone paving fades in color over a time, so to ensure that it retains its color we recommend sealing the paving or setts with color enhancers as soon as possible after installation.