Egineered Quartz is a man made material that can be used for many different applications such as bathroom vanity tops, shower benches, window sills, tub decks, and fireplace surrounds. Engineered Quartz is a more consistant material, meaning the little sample will look just like the slab. Since it is a man made material it is not porous and will never have to be sealed. Marblecast carries many diiferent brands.